Wow, I don't remember what size caps I used. I'm thinking they were 3 1000uF 35V ones and a pair of tvs's. On my other RX8 I used 2 1800uF 35V caps and a pair of TVS's as well. I've seen the Etti's cap banks and I think that is the most economical way to go. I would go with the etti-e035-lv cap bank.
6 KiloWatt A123 Racer
GTP-Pletty Big Maxximum+RX8. GTP-C50-6L Hacker+RX8. CRT.5-Pro4+ZTW esc.
24s2p EVG SX 49.6mph Ebike.
18s4p Raptor 60mph Ebike. 11.5KW