I just picked up one of these Dinotte tail lights. I have to take expensive items off my bike when I park it and I'd like to maintain the status quo where I remove my tail light with my seat wedge. Since my current wedge (Novara small, 6x3x3 in, 49 cu in.) is crammed full I can't stick the battery pack safely into the seat wedge and then attach the light to the exterior strap. I was thinking of getting the size up (Novara medium, 7.7x3.9x3.7 in, 91 cu in.) or a Topeak expanding aero wedge (8x5x3.8 in, 80 cu in.) to start with. Then I'll have to try to do the PVC pipe trick with the wedge pack.

Anyone here have the light mounted in a similar fashion? Basically I'm trying to speed up the process of getting everything off the bike at work and putting it back on.