There is no way I would go from a solid roller to a SFT for ANY reason.
You've already spent the money for the SR stuff and that's the hard part.
That roller is much more reliable than a SFT. I think some people confuse the lower spring loads of the SFT make it more reliable. It's not.
No way would I change that out. The gear issue is bad though. That still wouldn't sway me from the roller.
EDIT: I just read your last post. No way in hell am I running a bracket car with SFT lifters. That's a huge step backwards in any case.