Know this s an old thread but ???
I rig North (an old IQ) and GTX`s (both 07`s) popping cambers on after mast insertion ,a touch of DH and fair bit of outhaul.I also always detension battens on all cams before derigging and re-tension after fully rigging.Sounds a pain but it does make process loads easier.(ie detensioning battens) Takes 2 minutes to tension up battens ???