Making cam timing tools

Im going to tackle the cambelt replacement on my 2002 renault scenic to avoid the arm and a leg scenario from the local garages.

Ive found the cam timing kit made by sealey,but Im after the dimensions for making up the tools myself,ive scoured the forums and found the info for the crank pin and the camshaft end slots tool. I just need the dimensions for the camshaft locking tool in case of the cam pulley bolts having to be loosened to bring the timing in bang on







cheers:)