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best Rob Allen roller conversion , and band hole ballast


New Member
Mar 20, 2024
I have a Rob Allen Tuna 70cm gun that I use extensively for reefy and bay stuff, I also take it out most times I dive as backup gun. I have been considering converting it to a roller to get a little more power. I was wondering if anyone had experience with the various different conversion kits, some cost twice as much as others and I'm not sure some of the upgrades are worth the cost.

Secondly, I want to ballast my 120 wooden roller. I am trying to think of a way I could use the band hole (I am not running a kicker band and I converted it from 120-single band to 120 single roller) to have some kind of screw together ballasting system. Has anyone made one of these?
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