You missed out on the real purpose of a Brooks B18! Take a razor and cut off the saddle bag loops, trim off any other excess, drill the top until it is swiss cheese like and then fit it to your grass track bike! Light and indestructible! Comfort is not required as you are only going to sit on it for a few minutes a week at the most. Beauty is in the eye of the cyclist sitting on it. By the way, if you want a B18, I have a box full of NOS, name your price and I will pay you to take them!
Regards
Martin Coopland