about mounting rear strobes I found the supplied mounting hardware was lacking and required some ingenuity. I always mount one on the rear rack, and also now mount a 2nd on my left drop bar. I like thin metal strapping sold in a roll from a hardware store. it is malleable and easily cut with a hack saw if you have a vise to hold it while cutting. this kind of strapping has lot's of holes so one doesn't have to drill any. common nuts and bolts can be used. here are some pics showing how I mount the rear strobes (Planet Bike Superflash)

I have a 3rd mount not shown here, but I'll spare the description and try to get a picture.