Screw in recoil reducer in the butt works well, though it can make the rifle a bit unbalanced. If set up correctly you can remove it in a couple of minutes. I have one for my R8 that I can install or take out at will although I don’t use it as 375H&H doesn’t need it.
When choosing recoil reducers keep in mind mercury is not allowed for air travel. It reacts with aluminium.
My wife and I both have R8's with 22mm barrels and kickstops.
The kickstop really does balance our rifles well.
Without it the 22mm barrel make the rifle very front heavy.
And to be honest, our rifles are wicked heavy compared to most.
We will suffer the weight of heavy rifles for less felt recoil.
There is no free lunch.
The option to pull the kickstop out is awesome.
However I'd probably go with a whole new R8 stock for a lightweight rig.