I wanted to mount my Manfrotto Compact Xtreme monopod/selfistick on my Pixi Evo tripod, to have a small footprint stand for shooting in 360.
The monopod came with a ballhead, including a round thread plate, that i dont need. I superglued it to the adaptor.
I'm pretty sure, that i did measure correctly, but i had to scale it to 112% on my Up! Mini.
I also added some sticky velcro (soft side) for some friction and to preserve the handle.