[Closed] Help please with BB 2x9 set up........need a refresher!

Just about to fit a double up front on the bike, normally i run my hope bb with 2 spacers on the driveside and 1 spacer non-driveside when i'm running 3x9, dont ask me why i just always have done. When i run SS i usually remove one of the driveside spacers and it seems to be fine chainline-wise. When i last 'tried' 2x9 i seemed to get a lot of chainsuck but i dont recall how many spacers i ran, however i have since changed my frame so it may or may not be a contributing factor?

My question to the stw massif is what to run spacer-wise on a 2x9 set up?

thanks in advance and even better if there is some reasoning/experience explaining it! 😀

JB