[hippich]

https://imgur.com/qelKWpL

Here is youtube video someone fixing broken unit to get an idea what it looks like inside - https://www.youtube.com/watch?v=-k_6NsqFAdc

Not sized properly. Transmitter is sitting on a pretty tall pole right now and getting it off is a bit of a hassle. And I also already covered cap with a glued heatshrink to protect against elements, so accurate measurements are not possible without destroying it... But I hope it can give an idea what I came up with.

Thanks for the link to the simulation tool!