Your thinking is correct but keep in mind my conversion is just positioning the puck to where it would sit within the current base plate design of the old trolly....which is pretty bloody small if truth be told:
joyeux anniversaire en russe google traduction
I don't have a new cart design in...
I've done it. The puck arrived attached to a little card that you can use as a template to drill 3 holes. Centre hole you drill right through, outer holes you are just making a little recess.
Then just grab a longer M5 bolt( I used 40mm in length but 35mm would be better) This bolt goes...