There comes a time that you have to fish or cut bait.

The odds GREATLY favor the Formula hub having 10 & 9mm axles rear and front. You know the hardware has to be made for that thread, since doing it any other way would add all sorts of unnecessary complications. So it either has threaded cones, or a threaded adapter to support the inner race of a cartridge bearing. Either is the sam for your purposes.

So the only glitch might be if there is some kind of shoulder that is part of the axle. My educated guess is that it would be very unlikely because it would add to the expense of producing the axle and hub, and there are easier and cheaper ways to locate the bearings.

So, you have to decide whether to act on the information you have and go forward with the risk that there's an unforeseen issue, be Hamlet and wait and wonder until you either give up, or bite the bullet after all.