Monarch Plus shim stack query

I have a Monarch Plus RC3 in ML tune that i’m looking to reduce the mid and high speed compression on a bit (my frame has a 2:1 leverage ratio). Research (mostly MTBR threads) suggested that the HSC is controlled by the shim stack in the piggyback reservoir, but my testing (removing a couple of shims) and theory from looking how the oil flows, seems to suggest this affects the LSC when using the compression adjustment lever.

Am I right in thinking that I need to be adjusting the main piston shim stack instead?

Bump on this in the hope someone can save me a few more trial and error assemblies!

I cant help but following with interest.

running a ML on a 301 which has a 2.5 ish ratio.

glad i didnt get the MM thats for sure

Get it tuned when you service it or if it’s new just a tune. I got my son’s monarch and sid tuned made a big difference due to his weight

poah – I was looking to DIY it (I like tinkering…)

should be a thread on MTBR