Yeah, I could go via my own Yamaha Mixer.
And yeah the LH side would be having the FX Aid at the end of line but I guess it would be better before with a mult. The RH side is infinity more capable but a load of modules for a load of money.
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.