Always. Just last week, we took the boys to CHOP for check ups in cardiology unit, and Dr. Vetter, world renowned pediatric heart specialist, had dropped her "old school" solar powered calculator and it was cracked and screen was dislodged and had a "cloudy" screen. She asked "are you a fix it guy and have a swiss army knife" and I said actually I do! She was amazed as I unscrewed the tiny Phillips head screws, reconfigured the circuit board and wires, adjusted screen, and handed it back to her in fine working order!