[opelmark]

It's totally unnecessary to cut your rotor. It sounds like you guys aren't getting the Pertronix round magnet seated--if you twist the magnet, while pressing down, it'll eventually drop down far enough onto the dist shaft to allow enough room for the rotor button on top.

Trust me. I have at least 10K miles experience with 1847V Pertronix units--NEVER had to hack up a rotor.

 

[opelmark]

BTW, I have one of the Pertronix units I run in a Bosch 0 231 176 012 distributor, which was used in ALL Mantas (all Opels, in fact) in 1974. If it works in my distributor, it should work in yours, Calvin.