Very close to getting all three up and running.
I had to pull the engine on the nitro version, install an HPI pull start on the engine. While I was at it I dropped the head into the tumbler to bring the original luster back up and then milled a couple cross hatches in the head with my new $350 Proxxon MF-70 Mini-Mill. I also used the mill to make a plate for the plate style NTB conversion. Pics coming soon.
http://proxxon.com/us/