Hi all - I just got a Vendo 407 and it did not have a working coin mech.  There's a momentary contact switch in the coin return tray that executes the popular jones plug free vend hack.

However - it seems like everyone else who does this hack is able to simply push the button (and let go) then make their selection.  My machine seems very finicky and requires that I push them both at once, which then results in 2 cans being delivered if you hold it too long.

Here's a video, let me know if you have any ideas!

There's a strange component you can see at 1:12 in the video - I'm not sure what the deal is with this thing (but again I'm a newbie, so maybe this is obvious)

Thanks in advance.

David