I can't speak for
@Mineral but I had James make my arms even length because I was afraid that would be a problem. In the end the spare tire actually has more impact on the ability to open when hitched up than the arm length does, because the spare is starting ~15" closer to the jack.
Ultimately mine clears just fine, and my jack was pretty close to the tongue. I did have to get a longer drop shank (not taller, just longer) to make it work.
The one place that I had an issue which surprised me was that on a very tight turn or when jackknifed backing up my spare tire would contact my propane cylinder. I think it would have been OK if the spare was perfectly vertical, but because it's tilted the bottom of the tire would make contact. I ended up moving the propane cylinders back about 3-4" and they seem to always clear now. On one hand I'd like the tire to be vertical since the lip of my wheel tends to collect and hold water, but I have made contact with the bottom of the spare on a V notch in Moab and being tilted was probably better for the departure angle.