Hi Bob,
I don't have a CVO bike, I have a Roadking Custom but I have researched the heck out of different front end parts. My bike came stock with the same awful lowered HD air shocks that the SEEG comes with, so I replaced them immediately with 12" standard spring Progressive 440's. The RK Custom is lowered in the rear, but the front end is the same as a standard RK.
I am short(5'6" with a 29" inseam), so the lower I can get my bike the better but I am not willing to ruin the ride just to get it lower. I bought that HD fork lowering kit(the spring kit, not the cartridge setup)for it. The damper rod in the kit is 1/2" shorter than the standard RK rod. The rebound springs are longer & stiffer & the fork springs are about 1/4" shorter than my stock setup.
At first, I liked the ride of the new setup -it is stiffer than a stock RK & handles great, but it ended up being stiffer than I really wanted. I took the forks apart again & drilled out the holes in the damper rod to the larger size of the stock rods. I then went back to the stock rebound spring but added a PVC spacer to lower the forks slightly more. I then reassembled it with the shorter springs & HD *E* fork oil & tried it out.
Now, it is exactly the way I wanted it, it sits slightly lower than an SE bike & rides very smooth. Sharp freeway bumps like the expansion joints where kind of jolting with the lowering kit, now I hardly feel them at all.
~John