You can check these out from Mike -
35 volt, 1200uf capacitor... I used a pair to mod my
125B... really made a big difference for those demanding moments... like: heavy braking and hard acceleration...
I don't think these ESC were built with LVCs back in the day... people were still using 'high quality' NIMHs.
http://www.schulze-elektronik-gmbh.de/futu-e.htm