Auto Tyre truer

Auto tyre truer add on tool
Inspired by the Cincy Slot version in one of their video's
the reduction gear box motor i used :-
https://www.ebay.co.uk/itm/353173452256
i selected the 12v 30rpm version
assembly in operation :-
https://www.youtube.com/watch?v=0PQBn2qr8uE

i found the printed slide block was too light
And the pivot arm caused it to rock a little in the slide
adding a little weight remedies this and it now works great