Ok so I guess I do have 2 different motives here and need to separate. Let's talk about the wine first. I really want to try between 2 different strains of yeast. I am always doing that with beer and would love to see what each one comes out with so I can understand which one I would like to move forward with on a consistent basis for common batches. I have the RP15 and the WLP750. I don't see a whole lot of reviews on the WLP750 so I am extremely interested to see the result. I'm pretty set on dong at least one split for the yeasties.
Now, the splitting of each yeast batch so I can use different tannins, that is merely the lack of experience and afraid to commit a whole batch to one versus the other. The two as mentioned are FT Rouge and FT Rouge Soft. I can't seem to find enough detail/reviews to understand what the difference may be. Am I wasting my time doing that split?
So if I'm reading this right, you want to split the wine kit into 4:
RP15 + FT Rouge
RP15 + FT Rouge Soft
WLP750 + FT Rouge
WLP750 + FT Rouge Soft
That doesnt sound impossible, but if it's a 6-gallon kit, just understand that that means it's going to be ~1.5 gallons of 'must', which is gonna probably leave you with just over a gallon each, by the time its all said and done.. 6-7 bottles, per.
The difficulty with this comes with trying to bulk age these small oddball sized batches long enough to get them cleared, so you can bottle them.
The information I have on the FT Rouge and FT Rouge Soft products isn't much more detailed than what you've probably already read. My approach was to use the FT Rouge Soft for a few seasons, making everything I normally make, and then I'll be switching to FT Rouge, to make my own comparison. I'll be able to offer insight eventually, but the best way to find out is to do something similar to what you're planning (I just usually work on a larger scale, lol; but thats just me)
On to the mead and/or Agave. My main goal was to do the Agave Mead. Half and Half. Again, the lack of experience is making me concerned about putting 12 lbs of each in a batch and have it taste like ****. I also would like to see what the Agave on it's own would turn out to and the same goes for the honey. Do a simple batch of each. So, what I gather from Deezil is that I may be best off to do separate batches and just combine once bulk aged.
I'd recommend doing it how I mentioned, simply because there's no way to know if 50-50 mead to agave is going to be the best flavor profile; but if you ferment them separately, you can do some bench trials to figure out the best ratio of mead : agave for your tastes.
You may very well like 25% agave to 75% mead, for example (or any other ratio), but if you combine on the front-end there's little you can do to change those ratios later. You'll also be able to set some of each the agave and mead ferments aside to see how they age alongside the blended version. This will teach you more than front-loading it.
After you've gone through the process of making this agave-mead, then you can later on, blend the two together on the front-end, based on your favored blend and make a second batch with the insight you've gained from this experiment. That way, the 2nd batch will only require minor tweaks to get it where you want it instead of having multiple gallons of a 50-50 batch, that you don't really care for.
Please explain. I understand there is less room for error as you are working with smaller units and by adjusting levels of things at that small a quantity can make a larger impact on the percentage of additions. But that's what calibrated digital scales and measurements are for. What else is prohibiting from fermenting cleanly?
Mostly, it's the fermentation time. If you have a smaller-than 5-gallon batch, and you pitch a whole packet of yeast, it's going to ferment faster than a larger batch would with that same yeast packet. This can catch people off guard, and you can very easily miss the nutrient additions involved with a staggered nutrient protocol. If you're doing this with yeasts you aren't familiar with, or if they're heavy feeders, you raise the potential of missing those nutrient benchmarks, and that yeast is going to create H2S at the very least. It may get stuck, it may create other off odors and flavors that you cant really fix easily.
Then you're stuck with one of the experimental variables full of flaws, and it would skew the whole experience.
Ok, so yes, an auto siphon will likely leave more volume of liquid behind because of design. But on transfer from my keg fermented and 5/6 gallon carboys, I use a standard racking cane through a carboy cap (carboy) or spending valve assembly (for the keg) and have CO2 attached so I essentially push the liquid up the cane via forced pressure around 3-5 psi. Creating something similar with a bung, then taking it slow and tilting the small vessel to gather some of the liquid wouldn't loose all that much.
I also purge everything with CO2 one each side during racking so that I minimize oxygen exposure. This along with some sanitization care, and TIME, should make for easy clearing via primary to secondary to bulk.
I get it though, yes, more of a PITA.
The racking losses really occur when folks try to separate the sediment out. Most, when going for that really clear finished product, end up stopping the siphon before even the slightest traces go up the racking can. Usually closer to the bulk aging than the fermentation end of things.
Due to the design of the racking cane, with the tip on the end, this can leave anything from a pint to a quart behind. If folks do this a few times, because they thought the wine/mead was clear but it dropped more sediment again, the losses add up.
The fix to this, is to still rack in that fashion, but take what's left in the bottom of the carboy, and isolate it into a quart jar or wine bottle and let the sediment settle all over again. From there you can pour off the wine when it clears, either into another catch jar or into the wine/mead it came from, depending both on where you're at in the process (if you see another sediment racking coming or not) and how clear that isolated tidbit is itself.