Hi All,
Just looked at my own yet to be flown HotSpot and I think the seperation may just be simple flutter induced at high speed due to the lack of support of the very thin skin forward of the ply structure. My usual remedy for flimsy GRP parts is to reinforce with CF and Epoxy and this I did around the Nosewheel-well and spoiler. Did not do it around the main gear as it looked like a chore. My fix will be to add a solid ply/CF support right up to the edge of the rear well skin. My demised ROO suffered wing flutter with complete failure of the main spar at about 240mph and it was rather scary....
Cheers
Andre