I do a lot of projects that require a bunch of drilling for hardware.

For me this the nerve wracking part of woodworking, I hate taking a file to
massage my misaligned hardware holes. It seems all the hardware I choose can
't have easy measurements, like 2 inches between centers.

Does anyone make an adjustable drilling jig or can anyone suggest a book or
web site that covers accurate hardware placement and drilling.

Thanks,
John