This was designed for Tuesfutu's live sonar ice fishing pole kit. It uses one m6 heatsert, mine were 9mm O.D. and 8mm tall like these.
https://www.amazon.ca/dp/B0CS6YCWHD?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_2&th=1
Print in PETG or better with atleast 4 walls!
The author remixed this model.
EE9 adapter for those of us who are to cheap to buy a garmin LVS!