Best Slipper and reverse questions

[Major Azzwoopin]

I am running a 2 speed savage with manual brakes. 9920 ESC and up to 6S LIPO. I want to know what is the best slipper configuration to run. Also is anyone here running reverse? I had all kinds of problems with my reverse. (the manual one servo activated) It kept jumping out of gear. I had to remove it. I can't get any gear mesh when I use the electrical reverse. I didn't think to look at why when I had the tranny tore open. I am sure it is due to the design since the nitro engine can't spin backwards they probably designed it so that it wouldn't mesh in that direction.

Thanks