Only one hour in the workshop today, it was enough to install the cabin heat valve. After some measuring I use the step bit to drill a 3/4" hole.




Then I use the 2,25" punch to make the bigger hole (it should be 2", but the tool is easy to use and the larger hole is of no consequences).




And the reseult after 30 seconds of work.




Then two holes were drilled for the mounting bolts, and the valve is installed.





And a picture from the cabin side, the lever is actuated via a cable.