RojoRacing
Donut Powered Wise-guy
Otherwise commonly know as the RMDWBSFM 
This project has been a long time coming but it took me spending the night as the shop 2 days in a row to find the time to focus. I actually got off work at noon today and I'm still in here moving onto the next Vendetta project.
What we have here is a newer style dual water bottle mount that attaches directly to at hard shell seat. I also machined a slot to accept a Planet Bike light mount for a clean and very solid placement, no more rattling or sagging tail light. The material used is black delrin plastic and I machined away as much excess material as I could to reduce weight. I maintained 0.100" wall thickness around all threaded holes and surfaces so it's really just a thin skeleton of a piece but is still so stiff I can't flex it at all. The more I work with the delrin the more amazing I find it is. I've stopped heli-coiling the threads because you can get some serious torque on these little M5x0.8 bolts in just the bare delrin. If your sharp you catch a few of my whoopsies during the machining which is why machinists have the saying measure twice cut once. If I make another one I'd like to machine out the corners of the recesses with a ball mill to soften the corner and eliminate fatigue points.
On a slightly related note I direct mounted the quick release for my Topeak saddle bag to the bottom of the headrest plate so now it's tucked away and out of the wind. I still need more storage for clothing and such during normal every day 100 mile rides but this setup is for racing with support and shorter fair weather rides.
Enjoy the pics
This project has been a long time coming but it took me spending the night as the shop 2 days in a row to find the time to focus. I actually got off work at noon today and I'm still in here moving onto the next Vendetta project.
What we have here is a newer style dual water bottle mount that attaches directly to at hard shell seat. I also machined a slot to accept a Planet Bike light mount for a clean and very solid placement, no more rattling or sagging tail light. The material used is black delrin plastic and I machined away as much excess material as I could to reduce weight. I maintained 0.100" wall thickness around all threaded holes and surfaces so it's really just a thin skeleton of a piece but is still so stiff I can't flex it at all. The more I work with the delrin the more amazing I find it is. I've stopped heli-coiling the threads because you can get some serious torque on these little M5x0.8 bolts in just the bare delrin. If your sharp you catch a few of my whoopsies during the machining which is why machinists have the saying measure twice cut once
. If I make another one I'd like to machine out the corners of the recesses with a ball mill to soften the corner and eliminate fatigue points. On a slightly related note I direct mounted the quick release for my Topeak saddle bag to the bottom of the headrest plate so now it's tucked away and out of the wind. I still need more storage for clothing and such during normal every day 100 mile rides but this setup is for racing with support and shorter fair weather rides.
Enjoy the pics
