Nice work there...as for that final 18hp hole, my suggestion would be a Chronoblob delay and, provided it fits, a Doepfer A-199 spring reverb. And, of course, you can tie those two together by patching the reverb into the Chronoblob's insert in its feedback path, yielding some interesting results.
But also, I'd chop up that output into two other possibilities, both from Erica: their DSP, which is a mono-in/stereo-out effects processor to 'stereoize' your overall sound, and their Out, because you (of course) need that output stage to step your levels down. Doesn't have the nifty dual 1/4" jacks, but still does the job.
As for reliable, top-shelf kitwork, several firms come to mind: Elby, Synthrotek, Random*Source, and Erica again. It's also worth a plunge into Synthcube to see what's in there, as a lot of tiny DIY firms work through them.