When I got my Varia 510 radar I swap down the saddle bags for a frame mount bag (and btw like the idea got more space to day pack), to be able to secure/mount the radar to the seat post.
This summer planning couple longer multiple days trail rides and I would need to bring more water for the trips. I have two camelbacks but finding not really comfortable riding with these longer hours on my back.
My idea comes back either to mount two more bottles to the front forks (CF and hesitating to drill these for thread inserts) or to attach some dual bottle cage to the seat post (not to the seat rail which would make the bottles vibrate/shake/rattle too much) and attach the Varia to the bottle cage - somehow...The seat post may give me m ore freedom raising up or lowering the bottles to best feel or liking.
Anybody have a proven parts or idea or how this may work?