Ya, that's a good point. The reason I did was because I thought electricians would be familiar with those exact screws and size and that somebody would know what screw driver removal tool was used back in the day.
all you need is a third of a turn, so you can slide the plate back, and release
the breakers, so they can fall in pieces into your hands.
i've never even bothered with a screwdriver:
1. Turn off main
2. Grab head across thickest portion with Kleins
3. Turn until loose enough to slide back
4. Remove smouldering POS breaker
5. use 3/8" square contact burnishing bar on bus
6. replace breaker with cheap new chinese knock off from home desperate
7. gently snug up screw a bit. don't over tighten. you'll need to loosen it again in another two weeks.