Timing disc for front pulley

Hi
A little while ago I found a bike engineer who had a timing disc that you could down load . The beauty of his system is that you could print it up to whatever size you require. Anyone remember this?
I want to print some up to suit my 36 & 38 tooth front pulleys & laminate them to stick on the pulleys.
My friend uses a hacksaw & cuts a groove in the inner cover so that a straight edge can be pushed in to point down to top dead centre.
Any other people have a timing method?
I am still trying to buy a dial guage to scew in the spark plug thread.

all the best Chris

Chris, All you need is a dead stop tool for the plug hole. My site tells how to make one and why.