Get the SS Kit.. it runs great.. but it's more than a 10 hours build time... take your time, do it well.. it's worth it... even the stock 26cc engine with a high speed/stall clutch runs great.. add a DDM pipe and it's awesome...
here's one of my firehammer with stock DTX 23cc CY Engine and only upgrade was the Jet Pro Pipe...
http://www.geocities.com/aqwut/LONDO...y/MOV03368.mpg
just because you're going to run Petrol, doesn't mean to you have to leave the forums.. LOL
I was planning on converting to Brushless 1/5th but I keep changing my mind to stay with Petrol... 30+ minutes of run time... cheap.. fast.. fun..