FPS loss after installing dynamic shaders and BLM mods

[Billy Pilgrim]

I've recently installed (and been enjoying - wow, they're great!) the dynamic shaders mod and the BLM Lights and Car mods/apps.

In the last few days I installed the latest stable build of dynamic shaders and started using BLM's two mods but have noticed a loss of maybe 10% or more of my fps.

I turned off the real mirror app (in dynamic shader) and got some fps back, but not that much.

Can anyone advise me on what might be causing the FPS loss?

(I have most/all of my setting at ultra, or whatever it's called) 1080ti with triples.