Great design and worked as intended. I did find the tolerance for the coldshoe was a bit tight, but could also be my settings.
Having the f3D file was great and easy to adjust in parameters, thanks! Printed at 25mm diameter for my 25mm tripod and it snaps on tight and has enough grip to not slide around.
Printed PETG on 0.6mm nozzle at 0.28 layer height and 3 perimeters, holding strong.
I'll maybe widen the coldshoe slot to accommodate my printer's tolerances using the f3D later. (edited)