Well it's all done - no heat gun required.

I did the passenger side using the heat gun and peeling away from the window - got stuck with a whole bunch of glue

The drivers side I did with no heat gun, just started at the top corner and when peeling I folded the tint against itself (not away from the window but bent at 180° flat against the window and pulled) and have almost NO residue left on that window.

Nothing to it, would do it again, good seller, A+++ ;-)