Boxer... He wants to use this on the trails at high speeds... The 2.5" track would not hold up to repeated use for this IMO.
But I do agree with you that the CE 2.5's are one of the best mountain tracks out there.
The CE will "FIT" ... but only has 1/4" of clearance (I've measured it) at the roof of the tunnel (where all the IQ-RMK's show rub marks). In anything but fluffy "blower" powder, it does rob HP from drag/windage. I had a long talk with Camoplast about this very issue, 1/4" is no where near enough clearance in order to not loose hp to drag.
If that CE in a RAW chassis has more clearance .... It will work much better and give better track speeds and load the clutches less than in the same sled with the same track with 1/4" clearance. Mark Holz... one of the best Polaris chassis guys out there agrees...which is why he made his conservative 5/8" drop for the chaincase on these sleds and installs it in all of his builds that run a tall lug track. Conservative in that it does not mess with the geometry of the sled too much but still more than doubles the clearance at the roof of the tunnel.
But then again... at an intended 85mph sustained TRAIL/Hardpack/Lake speed.. the CE is out of the picture anyway...too much leverage on the paddle causing heat/delamination a the root of the paddle according Camoplast... not just a matter of running scratchers either as the is heat buildup happens inside the rubber next to the belting line.