Hey Mike,
I made myself a sep funnel... well, sort of. I am surprised at how well it works.
Don't laugh:
Took a 2 liter clear plastic root beer bottle; drilled hole in lid and installed (flush) a valve. I used aquarium grade silicone to seal it.
On bottom of bottle I drilled a hole large enough to fit a #9 cork.
I fill the funnel from the opening in the bottom of the bottle.
Because the sides are tapered toward the lid, it works pretty well. I load in all the sediment and liquid from the very bottom of the racked container. I try to limit it to less than 2 liters, which the funnel holds.
After it sets awhile, I can see the sediment and where it stops. I let it all settle out for about 24 hours; turn the valve on and let it run until (1), the sediment is not visible anymore; (2), the wine is running clear.
I find that if I open the valve only slightly, the wine tends to run through the sediment and out first. So, I open it up all the way and shut it off quickly.
Since I started using it, I haven't lost much wine.
Thanks for telling me about your SEP funnel.