Limiter strap at factory setting, skis set narrow, front springs at 2, rear spring on #3, and front skid spring about 3 turns from factory harder. I also pulled one link off the sway-bar. Riser block is just a tad ( 1 degree ) forward of inline with the post, and I have the bars set at 2 1/2 rocked forward so the "hooks" on the end of the bars are almost straight down.
I'm about 200# with all my crap, and pack.
No tunnel bags ( this puts a bunch of weight at the back of the sled )
Anyway, came off an 11 XP, set up about the same (other than the riser was vertical ) and found it ( the 11) hard to hold a line across a hill, it was always up, or down, which worked, but never flat across. The XM, I can do that. Same front end, same width at the foot wells, same track length.
The XM also has a slightly different caster angle on the spindle, and they changed the skis from last year also. They have a flatter tail to help with the issue of the XP always wanting to climb the hill rather than stay flat.
I've got just over 200 miles so far, and have been very comfortable on side hills, even working up and around trees on road side banks. Which are very steep angle hills. I've not had to apply much effort or had to "push" the thing down. Yes the Pro may flop over with less effort, however the XM is real close in my opinion. I think the XM is more predictable now than the XP was.