NO WIRE HANGERS!!! EVER!!! *
* Except when you’re trying to calculate the distance between your new towers and where they’ll end up on your frame.
Vice-gripped the initial tower location to get forward/backward location, sprayed grey primer through the mount holes, notched and radius’d out the frame, remounted the towers and used them as a drill jig for my clearance holes.
Bought extra thick McMaster-Carr machine set-up washers to cover any sloppy looking holes and trial bolted the hardware to the frame.
The wire hanger routine was to reach around the block - from below - to get the distance between the two motor mount slots. Just a common hanger with the hook cut off - small loops bent at both ends - and then bend the whole thing into a "U" shape, allowing measurement with a tape and a double check against the towers bolted on to the frame.
It’s within a quarter of an inch of being dead-nuts, and that’s plenty close enough for this application.