As below I'm a 90kg intermediate long term surfer. I've had a 6'8" Alt which I got as I was coming back into the water after a long layoff. While it's fine I feel I can do with a touch less volume. I recently bought a 6'4" Futura which paddles fine. While it hasn't got float for the absolutely most gutless waves, it has enough for most conditions. Copunterbalancing that, as I'm getting older I feel like I can benefit from a touch more width than is probably "standard" on my boards.
The board would be used typically in head high plus beach break, reef break and point conditions. While there is no doubt a lot of overlap with the Alt and the Futura, so far I'm finding the Alt just a touch more responsive.
So I was wondering what views there were around me doing a CBD customisation on a 6'6" by making only one change, namely bringing the width out to somewhere between 20" and 20.25". The latter width is exactly the same as the 6'8" which I like, and indeed provided that's not considered too extreme that's probably what I'd do. It'd probably replace the 6'8" but I may keep the 6'8" for a while just out of caution.