I know I'm a bit out of the loop now being in a different island and all but alot of the places there aren't holds is because you can't put them there. I know that's the case with the top of the invert slab and the top of the bulge on the overhang. It's because when they revamped the rec centre they shafted us a bit and took half the t-nuts out which means we can't screw holds in those places. I had various meetings with them but got no where... am sure you can move the holds around that are there though and put up some new routes to keep things interesting :)

 As for solving the t-nut problem, to get your point across I propose a sit in where you camp over night and drink beer in the boulder room perhaps chanting loudly in protest....