you don't want to force in a screw...and risk stripping it and ruining the slots.
a good
magnetic head screwdriver works wonders...especially if you drop the screw and can't get your grubby fingers between the mb and case, lol.
if you're playing with hundreds of screws a day, I can see where purchasing a $40-$50 screwdriver would be useful, but I'd just stick with what's standard, imho.
I used to work for a small company back home which installed networks and puters into small businesses...we'd do lots of modifications (take out proprietary vid cards, etc) on their Compaq puters...and Compaq provided free magnetic screwdrivers with each order from them (corporate account) to help with the assembly/disassembly. I use that even now, though the head is a little stripped. the magnetic head is extremely helpful.
~Branson