I have found that a gun screw driver set is great for working on models with slotted screws. The set I have has one handle and an extensive array of different sized bits, all of which have parallel sides to their tips. These will not try to climb out of a slot and damage anything including knuckles. Only problem is that the plastic they used for the handle has a putrid smell that has not diminished in intensity over 30 years. Jesse in Tennessee > One of the big disadvantages of screw driver slotted > grub screws, is that all too often we (and I bet that > includes almost all of us at times) dont use a > correctly ground screwdriver, with the result that the > tip spreads the "legs" of the screw slot, and that > tends to jam the screw even tighter, or at worst, snap > off one side of the screw making it (almost) > impossible to remove. MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.