I recently used this great mini write-up from the road cycling forum. I have a taillight mounted to the swat mounts under my seat so a regular saddle mounted bag wasn't going to work for me. And, like the author, I hate having a bag there anyway.
Originally Posted by
Rides4Beer
My Diverge frame has 3 attachment points for a cage on the seat tube so I didn't need the 2 slot B-Rad, only the 3 slot. But I like how it turned out. The small size lezyne bag is only big enough for tools, too small for a 35-45c tube and tools. The next size up bag, medium, mounted differently so it wouldn't work right with the medium size accessory mount. The mounting plate hole needed to be opened up a bit to fit the buckle on the bag strap but since its aluminum a sharp steel hand file made quick work of it. I really like how clean it looks on the bike.