I have an Accel 77291 Dual Sync Distributor for a Small Block Ford. I cannot remove the rotor. I've never seen anything like this. It's a pull-off type rotor, not screwed down. The instructions for "phasing" mention 5/64" Allen head screws to MOVE the rotor, but I don't even see those. This type of rotor should simply pull straight up, to remove, correct? That's the way they've worked since the beginning of time. What am I missing here? It'd seem this line of distributors has been discontinued, but I'm hoping someone has experience with them. Thanks for any advice. Courtney