Hi Kegan
Real nice looking Jig mate!
Im thinking of doing something along the same lines.
That top rail you use to pin the clamp in place, do you think it would be possible to mount a pivoting bolt on on end of it to allow for offest? then maybe secure the adjusting (loose) end with a nail or pin that could be set into predrilled positions at the knock end of the jig to lock it iall into place?
Totally awesome and cheers cobber :-)
Jeff