A cylindrical hone is definitely the most narrow hone a person can use, period. Since the razor is contacting the cylinder at only two points (bevel and spine), in theory it's the best tool to use to ensure that the most defective of razors receives equal contact on the hone.

I know others have experimented with honing on cylinders as have I. Rather than honing on ceramic rods, I used some wood dowels over which I placed different grit 3M abrasive film both the PSA versions and also using a thin layer of rubber cement for the non-PSA (Pressure Sensitive Adhesive backed film). My results echoed yours. However, the problems I had were at the higher grits all the way up to .5 micron. Personally, I could not get edges honed on cylinders as nice to shave with as I could using flat hones/surfaces. Why? I'm not sure. Part of the challenge with cylinders and the fact that the entire blade is only contacting the cylinder at two points meaning there has to be a much greater load or force at the contact points. Would this cause deflection at the edge when honing hollow ground razors? I do recall that I did not experiment with heavy wedges using this method. I stopped the experiment and went on to other things. I'm not discounting this method since I found it has merit in the fact that you can ensure both bevels on both sides of the razor easily and automatically made contact the entire length of the edge no matter how defective, wavy, warped, twisted a razor might be.

Chris L