You better check your valves. Not doing an adjustment is one thing. Not even CHECKING is just dumb and asking for major trouble. I am being honest and just trying to help you so do not shoot the messenger. They will be very tight at 55k if it has never been done. As a matter of fact at 55k your probably going to start to loose compression and then start burning valves and seats. MOB is correct. You are going to inform the next owner that you never did the proper maintenance let alone CHECKED. Right??
At the very least some valve gaps will be near gone with out a doubt. I have seen 2 different C14's done myself and both were out of spec too tight at or below 24k miles.
I have the Ohlins. It makes the stock shock feel like junk. You can buy a Penske for less than half with a new proper spring which you need to do anyway. The Penske would be the way to go on a budget.
Pre-load will never help you no matter how much you add if the spring rate is wrong . Your sag will be too great.
Pre-load has nothing to do with how hard or soft the spring is. It has to to with Ride-height and proper chassis geometry.
No more adjustment in the preload cartridge. Without any preload it was way too soft.