* at two months we tend to add both metabisulphite and sorbate, you could get away with meta if it is dry since sugar is the driver to encourage regrowth.
* my experience is that red grape holds some SO2 therefore it might be OK, whites as well as country wines consume SO2 therefore I assume zero and add more meta every time I rack/ transfer. The eventual when you can test is “add enough to make 50ppm”. The main purpose for adding more meta is to increase the shelf life. If you plan on using this batch within a year again you might let it go.
* I siphon as much as I can, do you have a racking cane? If not polyethylene tubing straightens out if heated,,, ie I make my own racking canes, siphon tubes, long runs, I have collected silicone tubing I patch racking tubes together with,,, vinyl also will work to patch tubes together,,,, early days I would work in the kitchen and place the carboy on the counter and use a drawer to siphon bottles into ie look at what you have for height example an empty pail up side down
* SO2 is nasty stuff! I did coughing fits starting siphons and eventually got a vacuum so I wouldn’t breath it.
* corks generally store them dry, yes some will slosh sanitizer on them and last week someone posted about a humidor for sanitizing. I use plastic Nomacork and always slosh in a cottage carton with some sanitizer.
remember wine is forgiving, we each use different tweaks and by and large they work.