Flip-Out Intake Lock

I currently have a flip- out intake used as a dumper. I have a way to lock it in to the starting size restraint, but i dont have a way to lock it when it flips out. It is currently sliding across the floor since there is no limit. Any body have a reliable, simple lock for a flip-out intake?

See this thread:
Flip-Out Intake
And check out some robot reveals that have come out for the Starstruck season as well as some for past competitions like Clean Sweep or others of the like. For this season, I recommend that you check out the 8059D reveal and The Robot in 3 Days reveal. @meng specifically talks about his lock in the 8059D thread, and there is a point in the Robot in 3 Days video where they showcase their lock.

Hope this helps.