I want to carry enough variety of BLANK spokes that can be cut to length and threaded to repair a broken spoke on an otherwise sound rim with something that will at least come close to what the wheel is made from. I can't see trying to carry multiple lengths of spokes. With 2 colors of blank 14SS spokes and 2 length and 2 colors of 14DB blank spokes I can cover about 90% of the spectrum with 6 different blank spokes.

And yes. returns for compete rebuild would be done with spokes made to order for a new rim.

Over the last several years and 6000+ miles on mine and the wife's personal bikes I have replaced several spokes that were replaced ASAP when they broke. With the exception of a complete wheel that was replaced under warranty by specialized, I am still running the original rims. One of those OEM rims was re-laced to a new hub with the original spokes when the freewheel hub took a crap. I was able to upgrade to a DX Shimano cassette hub and the OEM spoke were just close enough in length to work..

One of the LBS in the area used to have a Hozan spoke threading machine and it was handy for making whatever I needed. Alas the machine got fupped duck and the shop eventually went out of business, For the last few years I have had to deal with hit or miss pre-threaded spoke lengths from another shop.

Even if I wasn't looking to do wheel repairs for others, I would want to purchase the Hozan spoke threading machine for my own maintenance needs. We currently have a Specialized Crosstrail Sport, a KHS Cross country FS bike, my own Frankenbike FS MTB, a WOOM 4 for the grandchildren and soon a WOOM 5.

Since all of my repair experience has been with more substantial MTB and hybrid bike rims, maybe I'm be overly optimistic in my ability to repair road bike wheels.