I'm going to assist in the thread necro here - I missed it first time round and to be frank I'm shocked.... (what I did there, did you saw it?)
Starting with the 'turning the shock over swaps compression and rebound damping rates' (yes, I called it rebound damping, because y'know, that's what it's actually called...) Are you actually being serious beachcomber? I mean, really?
Here's a simplfication that's actually correct. A damper is essentially a washer on a stick in a tube - on compression the stick is pushed into the tube and on rebound it's pulled out of the tube. How is the washer expected to know in which orientation it is sitting? In actuallity, the 'washer' has valves and shims, but they are fixed in relation to the travelling direction of the stick, regardless of orientation of the assembly.
You said you were referring to an 'experimental' shock "for a trike". Until I see some drawings or photographs of how the shock determines which way up it is I'm calling bullshit.
Now, as for the spring being fitted upside down (which going from the order of the thread is what you assumed was the reason for the hardness), again, really? Are you also working on experimental unidirectional springs that only bounce one way?
I know from previous experience that I'm flogging a dead horse by asking this, but what do you actually know about suspension design, other than "it feels better"?
To be quite blunt, saying it feels better means 2 parts of fuck all, a blancmange would probably feel better than a properly fubar OEM shock. And who replaces a good shock? Nobody normal, they replace them because of problems, real or perceived.
From a personal perspective, there is no way I would ever consider buying a shock that someone who said what has previously been said in this thread, had any sort of hand in "developing". It's even been known for me to change my mind about buying something because the person selling it didn't know what they were talking about.
BTW - OEM shox ARE rebuildable
SOME OEM shocks are "rebuildable". The K75 OEM unit is crimped so can't be stripped for rebuild by normal means. They are designed as a disposable unit.