so you still have your 'old' bike from which you can get your prior position measurements?

recommendations over the internet are problematic, especially for special situations, like an amputee (have I got that right?)

things that do make sense for most riders:

1. compare to your old 'position' - if the changes are very different, then it's best to 'work' to a new position over a longer period of time (weeks) and in small incremental steps... large changes screw riders up. small changes allow the body to adjust to new requirements, especially for the core, back, shoulder, neck and arms.

2. muscles tend to recover relatively quickly after 'abuse' - joints don't suffer abuse well and can take LONG periods to recover from imbalance/abuse. Guards the joints, whatever you do.

3. whenever making changes, I would do a few days of easy, steady, lower gear (70's on the flat) higher cadence riding (90-ish+) without a lot of 'power'/surging. This will confirm if the changes are improving your pedaling/hip/back/core/shoulder/neck balance.
Gives a chance for sore muscles to work thru it, and for problems in the joints to make themselves known without causing serious injury.

If you've been a regular rider before, I can;t imagine ignoring how you've been setup and riding before and suddenly making a huge change - you rbody will certainly not ignore the changes...
Edit: I Should note that even a gear in the 60's for flats would be a better choice if it allows a decent spin without forcing the stroke.