[TowerTalk] Gamma match

[VeeAthreePL]

I want build gamma match to match boom of my TA36 to 30M and I'd like to 
use remotely powered motorized gear box to drive shaft of the capacitor.
The motor has to be able turn right and left and be with a gear box. 
Motor should be able to drive fair size capacitor.
Any suggestions as what could be used here?
I do not any stepper motor as it is kinda complicated.
73 de Andy