Dynatron and miller
I got a Dynatron with a miller reduction drive shortly after my 5.8 grabbed my hand and smacked it something fierce. It snapped my ring finger on my right hand and just plain hurt the rest of it. This set up spins my 5.8 like its a little 40 and that is on 12 volts. I also use it on my ZDZ 80 Twin when I am lazy. Go with the Dynatron and miller you will not regret and either will your fingers.
Chris Puckett
Puckett Model Aviation