where to purchase template to drill flywheel

With regard to the registering of the flywheel on the spigot of the crank flange...

This picture shows that there's not much room:

0224crankflangemeasured.jpg

Just a tad under 6mm, so then what's the thickness of the Quicktime balancer? I can't see it being less than 2mm, possibly 2.5mm, which is still less than ⅛" (3.2mm). And then there's the chamfer on the bore of the flywheel, which I couldn't measure:

0224flywheelchamfer.jpg

This might well steal away another 2mm, but even if it's only 1.5mm we're looking at less than 2mm of the outside section of the spigot providing a secure seating of the (heavy) flywheel.