Controlling trenching on the pro involves the rear track shock, also. It's more than lightening steering effort.
Do this in this order:
1. Unload the front ski shock pre-load as much as you can without the retainers coming loose/off with the front in the air. Make sure you have a turn or two on the adjusters after retainers are loose. If you have alot of ski shock pre-load, you're going to get heavier steering. Less pre-load = less steering effort.
2. Check the rear track shock spring length, track in the air, and set to the recommended range - I'd go on the longer/lighter side if its for the GF, on a Pro, that's usually about 11" maximum spring length, but if it's trenching/too much ski lift, add alittle rear track shock spring pre-load/shorter length, but no more than a full rev at a time on the adjuster. Adding pre-load will make steering heavier, less ski lift, but less flickable. Less pre-load = less steering effort.
3. Fine tune steering effort, after 1. and 2., with the front track shock pre-load. Start with at least a half inch of thread showing below the adjuster on the spring. If it's still loose after 2. above, add more now. Otherwise, ride it first, adding preload 1-2 turns each time. More pre-load = less steering effort.
There's more in the manuals if you have them, but that's the best way to baseline the sled. If you're way out of whack on any of the above, particularly 1. and 2., you can chase some ghosts. No snow doesn't help, but you can baseline it now.