Thanks Filipo, that's lots of help. I tend to carry a complete set of spare cleats in my saddle bag (yes, I hate saddle bags but they're so useful!) but you've reminded me to go pick up a set as I've only recently switched to SPD. I hate padding on my bars and don't wear gloves but I'll see how I get on and if I need it I'll do what you suggest. I currently use fizik superlight on my ss and road bikes with no padding underneath!
Tyre wise I may struggle for clearance in my frame, but at the moment I don't intend to be riding mud so I should be OK with 30-32s I think. I'll check out Panaracer and see if they do something smaller. If anyone is listening from Cinelli and want's to donate a MASH SSCX that'd be great!