I tried this in the race section but got no responses so here it is again, please help or brain storm.

Was doing some recurve work on my distributor. Got the shaft end play down to around .007. But when I put the plastic spacer and mechanical advance plate back on. There is a whole lot of up down endplay between the clip and the mechanical advance plate. I seem to remember this being normal but it seems that this endplay would cause lots of timing inconsistencies considering the reluctor rides on the advance plate.

Should this endplay also be shimmed out? Or am I wrong about the timing inconstancies?

How is the up and down movement causing an inconsistency ?

I dont know that it is or would just asking myself. Does anyone else advance plate have this endplay in it.

I too shim the lower shaft end play to .005" by adding flat washer(s) under the plastic collar w the roll pin plus the added collar on the bottom and mashing the bottom tang some to widen it to fit the intershaft slot all to eliminate rotational play in the shaft. Yes every dizzy has a ton of axial play in the top plate & actually it has never occured to me to shim it & as said they do work OK like that and maybe just the slight downward tension from the rotor blade that contacts the underside of the cap center is enough to keep it forced downward?? but now I'm going to check it out see if it would make sense/if I can place a washer under the top nub to reduce it unless I get in there & see a reason to not mess with it but it sounds worth checking out. I'm always up for experimenting!