Anyone using an On-One Inbred with a Goldtec?

I want to run 41 x 15, and it's for road use. 36 x 13 is about the same, but cogs so small feel horrid, accentuate any out-of-roundness and aren't as efficient.

It fits OK on my Cannondale M1000 frame, but that has vertical dropouts and the ENO hub never worked properly for me - it kept creeping every time I rode up a steep hill. Hence the frame swap.

Hmmm, smaller cogs may have their negative points but is dropping a total of 7 teeth really gonna make a noticeable difference?
Also, would have thought larger cogs would be more likely to have out of roundness than smaller ones seeing as there's more room for error?

Seems like your bike's a bit of a bodge, you have a frame which requires a 50mm chainline and a hub that gives a 46.5mm chainline. The incompatability can be cured by using a different hub or a smaller chainring, with which its still possible to achieve your desired gearing but you'd rather take a hammer to your frame?