I used a Dremel for the webbing and a cordless power saw for the foot. The Dremel ensured that I could get the neatest possible cut, removing as little metal as possible. A bit time consuming though. The dremel also allowed my to dress off the leg neatly, making things easier for the welder to produce a better result. I wanted the end result to look factory, not like it had been done with a hammer and an axe.
For the 1250 (at least my one) I'd cut the webbing tangentially to the leg - meaning two separate cuts, through each side of the webbing separately. Then cut the foot off, right at the very bottom of the leg. Once done, you could effectively use the stand as-is, but you'd have a very high load on a small area.
The trick is to cut the foot and webbing off so that it almost resembles the original pre-assembly component parts, and can therefore be welded up relatively easily with a minimum of strength reduction. It might be worth talking to whomever will do the welding first, to see what they think before doing anything.
Be very sure not to cut too much off the leg - it is VERY easy to overestimate how much length reduction you need.
The second time I did this, I set the bike up so the both wheels were on a plank, with a separate piece of wood (same thickness as the plank) under the side stand. This replicated the stock set up on a normal flat surface, but not taking into account any road camber.
I then gradually reduced the thickness of the piece of wood under the sidestand until I achieved the angle I wanted. If memory serves - and it probably doesn't any more - I think the amount I cut off the leg to get the right angle was only a quarter inch or so, MUCH less than I expected. Do this before you cut the foot off.
Once you've cut the foot off, putting the bike on the now footless sidestand will give you a very general indication of what you will need to do. Going the opposite direction, I was very surprised how much difference just adding a foot area-expander piece made on a GS - I wanted to make parking on soft surfaces easier, not realizing that adding a few millimeters to the thickness of the foot would make the bike more vertical, and meant I had to be much more careful parking the bike on hard surfaces. Talk about the Law of Unintended Consequences...
This worked very well for me, but YMMV and whatever you do will be at your own risk! Best of luck with it.