Paul, I can achive the variable pressure as well, nothing difficult to it, just requiring a servo to adjust a setting. But I didnt use it before, because it defeats the KISS idea.

Also, something I learned , flow and pressure , as well ramsize arent everything. In Hannibalito1 I tried several flipper arm leverages and lengths, and its a huge difference, even with minimal changes.

But my own guidelines.
Buffertank volume 3* ram volume
1 Burkert is good for a 70mm bore ram
2 Burkerts are good for 100mm bore
and 140mm bore needs 4 burkerts.

Flipperarm at least 5 times stroke. Point of impact depending on force on the ram, but leverage so that at least 5 times the weight of the to be trown opponent is available on the point.