surly track hub to BMX spacing??

[davedbk]

I hadn't realised I have offered no update...

I swapped the roselli cog for a 15T cog about 5.5mm thick. I put it all together - I would have liked one more thread but it seemed secure enough.

60ks later, I haven't heard a peep from it. It's all good.

Thanks for your suggestions guys.