Pan Law, everything is better cooked in a Cast Iron Pan ;-)
I filled the current Gap with a Happy Nerding 4x Stereo Mix (for some more channels) and a Doepfer A138sv, there may be another A138sv on the horizon just for setting the positions of percussion. The more i read up the more I am drawn to the Befaco Hexmix and Hexpander.
Cheers for taking the time to put all that together.
Enjoy your spare HP, don't rush to fill every last space, this is not like filling sticker books. Resist the urge to 'complete' your rack, its never complete so just relax.