This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/40uuN7nfW0D
This are replacement parts for those 1/4 throttles for dirt bike from Aliexpress.
Those are cheap + great, but if you try to pull a bike from the ground using the throttle grip, the plastic part that holds the rotating grip in place will break, and the grip will also be damaged.
So this is a reinforced replacement for both. if you need to modify this - go to tinkercad.com.
BTW, tinkercad is the one and only program that enables people like me to create stuff like this - i tried most SW available incl. pro tools, and this is by far the most intuitive SW.
And export to stl is directly supported.
Please let me know if you like this or have any suggestions.