I am riding a folding bike (Xootr Swift like this one) and the seatpost is too thick to take my tail light mount (Plant Bike Superflash). Because of the geometry of the bike there is no good place to mount it on my rear triangle and I don't have a rack or panniers. Any tips on mounting it to my bike somehow? I usually wear a backpack, but I find that attaching it to my backpack with the belt clip doesn't work very well because it tends to droop and point down and I worry that it will fall off.
Thanks in advance.