ICORE, yes. IDPA, not with that gun. The barrel length restriction in IDPA is 4.2". In addition, if the gun is loaded using moon clips, it has to make major power factor - while it can be done, I wouldn't recommend it. And last, but not least, you can only load six rounds, which means the cylinder must be properly indexed after each reload - not exactly conducive to speed.
You are GTG with ICORE, but still putting yourself at a disadvantage against the 8-shooters.
I, too, made my own moon clip carrier because I had some clips with a center hole that was too large for the normal .5" posts. I bought two Tek-Lok fasteners and four .625" posts from Revolver supply. A piece of Kydex and some long machine screws (to secure the posts). Cut, drill, bend, screw and for less than $50 I had a workable carrier. Not the most beautiful looking, but highly functional...
Good luck with whatever you choose.
Adios,
Pizza Bob