There are no problems associated with the conversion. I have beat the daylights out of mine. More guys doing it all the time. It really does make a great upgrade for the GenII, twin or tripple, for about the same cash that a pipe would cost you.
'07 Apex RTX w/Pro X suspension conversion, Fox Floats w/resi's, Doo extro drivers, Cobra track, Dual Ryde FX rear clickers, .375 Edge torsion springs, HyGear Dual rate front skid springs, SLP anti-stab kit, Powermadd handguards/mirrors, 2" Rox riser, shimmed Poo skis w/custom (homemade) ski savers, Black chrome W/S, Graphics by Arctic FX, and a grin every time I think about it! New Project: 600HO Fusion bump sled, Air 2.0 w/hi/low valves, HRM spindles, Retro graphics, .359 torsion springs.