If the procedure were proven.

I have Stargardt's Disease which is a rare hereditary eye condition, sometiems referred to as Juvenile Macular Degeneration. There is currently gene therapy research going on right now to find a cure. More promising is stem sell research going on locally at OHSU. However, in either case, I am nto willing to be the guinea pig subject while they are still experimenting. I want a procedure with a probability of success with some kind of track record.

Yes they are experimenting on human volunteer subjects. I just don't care to undergo any treatment until they know what they are doing.

I don't know but it sounds like messing with nature and there's normally a downside to that.

yessssssssssssssssssssssssssssssss

Absolutely.
This would even pay for itself in societal terms as there'd be far fewer productive days lost to illness. So the general wellbeing of everyone would increase as we increase the wellbeing of the chronically ill.
That's a purely utilitarian argument, but has been true every time we've increased the welfare of a marginalised group.

I want it to make me physically twenty again. Theoretically, that would gvie me another 40 years of smoking, drinking, and carrying on - but this time I'd know what I was doing!

Yes, If I could have it done to prolong my life. I look upon gene splicing as just an advance in medicine and not as trying to act as god as many evangelicals are stating.