I removed mine using an old pair of side cutters. With the thin edge on these they can grab the fattest part of the head flush to the rail, and twist enough to get them a tiny bit out, enough to grab with pliers and twist the rest of the way.

Will try on the weekend.  Great tip!

Hey Marty
              I would suggest you fuse your Coils the owner of Rock had it home and setup for an hour and the slingshot blew a fuse GRRRR now i have to go out and fix it

Yep, that was going to be planned.  Once RTBB is back online I will buy a stack of the fuse holders and fuse EVERY coil.