Have not made any adjustments, well cuts off at 40 psi
Edit: I would set the pressure switch is set for 40/60 psi. Usually 3.5 turns clockwise on the nut on the big spring raises both cut-in and cut-off by 10 psi.
I would set the air precharge to 35 psi then, unless you get instructions to the contrary. The air precharge is always measured and set when the water pressure is zero.
While cycling, if the pressure never climbs to 55 psi, then LLigetfa's thought of the pressure switch snubber would explain it.
If the pressure climbs above 55 while cycling, suspect that your CSV is set to a too-high pressure. When you got the CSV, I expect there were instructions for adjusting.
See the "setting the valve" section of
https://cyclestopvalves.com/pages/csv1a-installation-instructions
As an unofficial alternative procedure I expect you could start by running water (2 to 3 gpm), and turn the adjusting screw CCW until the cycling stops. Then continue adjusting until the water pressure is where you want it to be -- maybe 50 psi. A tub (cold) or garden hose usually can put out about 5 gpm or so, so you could turn one of those until the flow was about 1/2 of max.
