Maybe something not readily thought of rhino. Did fatigue come quicker than normal shooting the match weak handed? Consequently, would you suggest plenty of or even more backup ammo when dedicated week hand carrying to account for misses you might not otherwise have?
Absolutely! By the time I was on the third or fourth string of each stage, I was shaking noticeably and having difficulty holding the gun steady in an extended position. Part of that is older injuries to my left shoulder and part is not shooting weak hand, unsupported for more than a 20 rounds or so in the past. The hardest part was maintaining the gun vertical so that it would recoil/flip in the direction that I expect.
Canting the gun gives more stability, but it's harder to hit relatively small targets.
I carry most of my ammo on left side anyway, so I don't know if I would carry more than I do for that reason. People who don't carry any extra ammo might want to reconsider.
For the first few strings, my marksmanship was reasonably good. When I missed on targets even when I was fatigued, I didn't miss by much.