3 screws hold down the cap, 10 - 2 - 5 o'clock positions. The first two are easy to reach, the 5 o'clock is the problem child. If I remove the intercooler pipe and the entire air box, I might be able to get a drill on the 8mm (head size) screw. I could put a 1 foot level on the side of the drill to make sure I was flat.

Then, again, I do have some adhesive backed aluminum foil. I could cut some 1 inch strips and insert them into the hole and try my luck??? The screws have a flat blade for a screwdriver, so there is only supposed to be minimal torque.

The cap I removed from the junkyard car took a lot of strength to break loose.
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Keeping it running is better than buying new