There is a long thread elsewhere that proposed the use of "thumb screws" to replace the stock screws.This allows easy use of just your finger tips to remove and refit the switch... & the next switch ..& the
The size thumb screw required is M4 x 0.7 x 10mm but 20mm is also mentioned.
http://rennlist.com/forums/996-forum/951946-ignition-switch-replacement-tip-2.html
Maybe this?
https://www.amazon.com/Screws-Shoulder-Metric-Thread-Knurled/dp/B01H0EFKD0