stock turbo + MBC = boost taper theory

[EnjoyDriving]

I'm not sure if the "tightening arm" will help the tapering "issue". In my thinking, the shortening is to reduce the amount of "opening" on the flapper and also make it shut tighter and faster, therefore improving the spooling?? But on the other hand, won't it make the wastegate easier to crack open by preloading it??

With a stiffer spring, like getting a Forge WGA, it would definitely hold the boost better, but won't it be more prone to the "boost spike" problem?

Please chime in on "tightening arm" vs "stiffer spring"