I carefully picked out 45 cards from my Touhou set and tweaked some of them to replace mechanics that doesn't make sense without the cards being in the full set. Might be done. Will look over it again.
But with this, that set has pretty much gone full circle: It started life as my second 45-card custom draft set, then got a little out of hand and grew to a full-and-then-some set (200+ cards now, but not all of them actually designed yet)... and now I've picked out the 45 "best" (or something) ones to make up one custom draft set.
Well, there you go.