Hi,

This is a modified version of the 100mm ball valve https://www.thingiverse.com/thing:4705215 by PeterH1500

I wanted something I could use on my loft ventilation system, it's still a work in progress but it seems to work well at the moment, the bracket is attached to the end of the valve using 2x 3mm screws and the switchbot is simply attached using 2 cable ties, I have printed most of this in 0.2mm strength profile but I think 0.28 would suffice also. 

Hope this helps someone out.