I got me a used RSPRO to run in a 1/8 buggy. I don't want to run a fan, so I opt for a heatsink.
The first pic shows the lowest heatsink profile setup and covers all the fets.
Second pics shows a cylindrical gangster heatsink. Would be easier to put on, but will increase the overall esc size. Copper will be used to cover the fets and some thermal 3M tape to the round heatsink.
I also have some 1 Farad 5.5V caps. Would be good for 1s setups or put two in series and will be good for 2s setups. Or 8 in series/parallel and be dumb.