I wanted a simple travel bag attachment for behind the seat on my 600. I used the existing two pre-drilled holes under the seat to attach two half inch metal emt tubes, bent 90 degrees at one end and capped them with plastic hole plugs. To attach them, I shoved two pieces of 3/8 ths fuel line into one end and then threaded a couple of fine thread 3/8 ths bolts into the assembly thru the existing holes in the seat back. It works trick but this is just a prototype. I intend to make another out of aluminum round stock and threading one end.

Nice! Just got my Ryker...that's all I need too. Can u show details/specs/more photos? Dont feel like spending another 300 for the maxi mount if I dont have to.