Had a Renner5 van... fuel & fone... and I really enjoyed the work.
Standard practice with the big national screen suppliers (when someone took a 'chip' in) was for a hefty thwack with the heel of the hand >>> 'See..?? they just crack on you - we'll have it fitted in a jiffy'.
Old chips which have gone milky, with water getting onto the inner plastic, are gahh... but even in the MOT Zone... a perfect fix is invisible and not a fail.
Good on yer....

alfaSleep