Are there any alternative main retracts that can be used on the Comp-ARF Lightning?

Dreamworks has a unit that will fit. I have had the C50 retracts in my Lightning for 3 years without an issue.

Which one of Dreamworks units will work?

Prolink gear set PL-33120-3

last item on page 2 and the first item on page 3 are lightning sets.

Hammer Engines offers one of the best ....

Thank you

Dreamworks Hercules retracts+ Behotec struts/wheels/brakes= a bullet proof combo. You need to make 8mm to 1/2" adapter pins or just buy a few fromhttp://altecarerc.com/, part # FB81/2.