I got a cylinder off weedeaterman and shipped it to Randy. He done his magic on its and sent it over with an email of a few things I had to do. And it's all worked well so far.
Hey I've done the same and yes it works considerably better than stock. Unfortunately it can always work
a lot better and a few corners get cut when you just grind and ship. Some of the old school, well respected builders on AS like Eric Copsey, Timberwolf (can't remember his real name?), Dennis Cahoon etc will not work on just the cylinder, only the whole saw.
Case matching, port matching etc are important build components plus carby mods. For example the ported and pop upped 7900 I own goes pretty hard for what it is but when you see a Copsey built 7900 it looks slow. At the time Eric was considerably more expensive though and I near got him to do a 390XP for me.
I'm not going to get too anal about it as I've done similar things but if you saw the difference that Neil made to a stock BB kit on a 365 with JUST a carby mod you'd be amazed. Grind and post, grind and post, grind and post. That seems to be the modern saw builder on AS

If I let Neil loose on my ported 390XP I reckon he'd get an extra 10% with the carby alone.
Guys like Timberwolf (and others) would build a saw and run it. Then they'd pull it down, play with it, then run it again, and so on and so on. Yes you'd pay for it but by the time they'd finished it was the whole package.
I've lost track of how many times I've heard builders here say "I've built faster and better saws than this one". Well bloody well fix it!!! Problem is that once the top is bolted back on that's as good as it gets. The more experienced builders know when something isn't quite right and they fix it.
I'm not having a crack at certain building methods but they are far more "supermarket check out" style now than they used to be only a few years ago. Every saw builder on AS blows their own trumpet to some extent and unfortunately a lot of their chest beating is based on a flat out race in softwood cants at some GTG. The guys who really know how to build saws keep pretty quiet. The guy who built Andrew's 441C and 461 is one example. Few people would even know he's a builder.