Have this exact same dilemma, doing a 5-day credit-card tour round Wales on a carbon bike. Seems like those SQRs are my best bet for a spare set of clothes, tools, bit of grub etc. Also worried about mounting it on a carbon seatpost but everything I've read said "it'll probably be fine". Couple of people mentioned wrapping some old innertube around the post to attach the mount to, partly to stop scratches and partly to spread the stress more evenly.
Have this exact same dilemma, doing a 5-day credit-card tour round Wales on a carbon bike. Seems like those SQRs are my best bet for a spare set of clothes, tools, bit of grub etc. Also worried about mounting it on a carbon seatpost but everything I've read said "it'll probably be fine". Couple of people mentioned wrapping some old innertube around the post to attach the mount to, partly to stop scratches and partly to spread the stress more evenly.