Truly good idea to use a dry marker along the spoke (the most sensible part of the butted spoke to twisting is the thinner portion) in order to check wind up.

However, with bladed spoke you fix the spoke wrench e turn the blade wrench to unwind. With round spoke, if you unwind to recover twist, you likely loose truing, and the story restart.
Any idea to clamp a round spoke?

For the record: front 24 holes radial, rear 28H 2nd laced.