493 carburetor tuning question

So this weekend I did some reading thanks to Mattax and I had too much of the transfer slot exposed which is why it was running so rich. Ive leaned it out and now my idle mixture screws actually do what they're supposed to. I went for a strole around the neighborhood, nothing crazy and it drove fine except I still have a bog with any quick throttle input. And I don't mean WOT I mean if I just tap the throttle quickly (maybe 30 to 40% travle) it will bog. I checked the play in my accelerator pump arm and there is none. First I loosened the adjustment nut a half a turn and there was still no play in the spring so I thought maybe it was dumping too much fuel in but the bog seemed unchanged if not worse. So I went back to the starting position. I didn't want to tighten the spring at all without doing some more research as I know if it's too tight you can break the pump at WOT.

Edit: I'm realizing now that if the spring is pre-loaded( which it seems it is) I may be loosing some displacement of the accelerator pump making it less effective.