Decided the best tool for tapering the foam surrounding the NG-30 hardpoints is a 2" wire cup brush in cremel, finished off with a 1.5" flappy sanding drum. Sanded flat foam and hardpoints.
Taped existing holes on NG-30 on inner side.
Sanded/ground NG-1 and MKNG-15A socket until a light sliding fit. Bulb depression and bulge mate nicely and retain the fitting.
Checked strut fit in MKNG-6 and MKNG-3.
Made clear plastic template for NG-51 for plotting hole pilots. Still not sure about this bit.