Thanks Bubba. We will be doing very basic stuff for the first while at least, lol! Poor Ali has been left to her own devices for five years and only ridden for half an hour every few months...so lots of schooling and light hacking for us!
It's pretty flat where we are hacking wise, and the sand school is level. I will never be brave enough for barrels, lol! Tomorrow is crunch time: I'm going to try the saddle on her and see how she reacts. She has a small scar on her flank from where her previous owner's tack had rubbed once. The vet thinks she should be fine though, and she was ok when I tried her before buying her.
Cross your fingers that it fits!
A moment of patience is worth an hour of wrath...