When to replace a crank?

[ZenSojourner]

<major snippage of lots of high tech talk>
1) Build the bike with an old 7 speed group.
2) Cold set it to 130mm as described by Sheldon Brown.
3) Load a 7 speed hub with 8 cogs from a 9 speed cassette and use the RD limit screws to keep a 9 speed shifter out of the last gear. I think this idea is also from Sheldon's site.
4) Narrow a 9 speed hub to 126mm.
<more major snippage of lots of high tech talk>

Well I'm impressed. LOL!

I hope to avoid doing anything too complicated (for my tiny pea brain I mean). But if I have to I'll definitely be referring back to this.

I swear I was more mechanically inclined when I was not that much younger. I did all the work on my former almost-fits bike. Now even a bar-wrap seems to be more than I want to have to deal with.