Re: '07 RG1527 - Out of Room to Adjust Pups Downward
Shim the neck pocket. You don't even have to go about it with a uniform thickness veneer - normally I'll just take a business card, fold it a couple times as needed and cut it down to make a narrow shim to raise just the very back of the neck pocket, sliding it into place behind the two farthest-in neck picket screws, to increase neck angle a bit. You'll then need to raise your bridge to get the action back where you want it, and in doing so you'll find that suddenly you have much more room to work under the pickups, especially with the bridge pickups.
I've always thought Ibanez guitars set up a little nicer with a little more neck angle than they generally ship from the factory with. YMMV, of course. The main argument for the "uniform thickness shim" approach (and this isn't the first time I've seen it suggested) is that you preserve as much wood-to-wood contact as possible this way. On the other side of the coin, you've got guys like Eric Johnson who advocate using nylon shims in the neck pocket to vibrationally isolate the neck from the body. So, give it a shot.