Here are the innards of my Specialized FSX fork.
https://www.retrobike.co.uk/threads/kestrel-csx-build.450047/post-3341929
You can see the stanchion tubes are shorter than Mag 21s are there are no springs on the bottom.
Interestingly, I'm having the same sticking issues that you have, although it has lessened a bit. I think it may have something to do with the alignment of the stanchions when everything is tightened at the crown. I full inflated each leg, secured the fork brace (brake arch), and only then did in slide the legs onto the crown and tighten the crown bolts, even if there was a slight height difference in how much the upper stanchions protruded from the crown. I knew then that the legs would compress on parallel and not be fighting each other at all. Maybe that would help?
https://www.retrobike.co.uk/threads/kestrel-csx-build.450047/post-3341929
You can see the stanchion tubes are shorter than Mag 21s are there are no springs on the bottom.
Interestingly, I'm having the same sticking issues that you have, although it has lessened a bit. I think it may have something to do with the alignment of the stanchions when everything is tightened at the crown. I full inflated each leg, secured the fork brace (brake arch), and only then did in slide the legs onto the crown and tighten the crown bolts, even if there was a slight height difference in how much the upper stanchions protruded from the crown. I knew then that the legs would compress on parallel and not be fighting each other at all. Maybe that would help?