Cold-setting with modern TrueTemper OXPLAT?
I recently bought a custom verylight frame from a private party, built by a well-known builder. When unboxed and test-fiting things, measuring clearances et cetera, I found the rear OLD is 127 mm. The builder (I spoke to him) says he builds for 130 mm, and targets 131 as a final setting so that rear wheels just slip in and out. He says the OX Plat makes a very rigid rear end and will take a lot of force to cold-set back out to 131.
I did a string test and the offset relative to the frame plane seems nearly even. The difference in string-to-seat-tube distances is between 1/2 and 1 mm, so it might be too small to measure reliably with a ruler or a caliper, since I'm eyeballing a string with a ruler. I checked to see if the seat tube is bent using a straightedge and there's no perceivable bowing.
I may choose to "withstand" the inconvenience of muscling my wheel in and out every time, or to cold set it. With this kind of frame tube, are there risks in cold-setting that might not be worth considering say for 531 or lesser alloys? The chainstays are flexed considerably to achieve a wide clearance for 42 mm 650b tires, already.