Shims and affect on suspension

2016 pro, currently has 1 shim up front on each side. Thinking of adding another and want to know how it affects the suspension: ride quality, travel ect... Essentially is a top spacer, which we knows makes trucks ride like shit, so what's the difference? Is it just not tall enough to have a negative effect? Any downside to adding another? Truck rides fine for my liking currently so I don't want to alter it to much, just want that little extra.
Thanks

 

I'm Running CB Shims up front with no issue. Ride is fine and rake looks stock with the rest of my suspension components. I have 2 on the driver side and 1 on the passenger.

 

Do you have stock bump stops

 

No, I also have a suspension lift.

 

Essentially a top spacer, or it is a top spacer? Does it go above the coilover shock?
Spacers are not recommended, and stacking them is also not a good idea.

Adding spacers increases the extended length of the shock far beyond what the suspension is designed to do. You will risk the UCA hitting the spring, steering & cv binding and potentially blowing out the shock. Have you seen this thread?
https://www.tundras.com/threads/recently-broke-my-front-shocks-need-help-on-choosing-new-ones.23986/

 

@Coachbuilder1