Started work on the top of the 705. Have to be careful here as there is a 1/2 inch shim that goes under an almost 2 inch plate. I decieded to clamp the shims in place and use the top bulkhead as a backdrill template. Again just carefully marked the shim placement, clamped and drilled. Next I deburred and will do the top plates the same way using the shims as a template.