I have hankered after an ali half door for a while and have knocked one up which for a first attempt is (i think) not too bad, but i am bracing myself for other opinions!
The notch allows shoulder room and plenty of space for steering wheel whirling..
The lower edge has a return on it to keep the updraft at bay and the profile means that the draft gently pushes the door in so (I hope) there is little chance of the poppers letting go. I used stronger spring poppers and made sure the leading edge had no gap.
Just needs a polish (or perhaps i make another one with some minor refinements (the top edge could be an inch lower and maybe slightly curved and the overall depth could reduce).
What do you think ?
Cheers from Bonn