Made quite a few things that a lot of people find very useful. All you smartphone users can thank me if you are ever using a function where a satellite is involved as I made the bits to make it possible (and over two dozen companies failed to do so before coming to me).
Had a thalidomide victim come in to get some custom golf clubs made for him, which was good, he was well chuffed (he had almost perfectly formed hands, just hardly any arms, the clubs were about six foot long).
Most rewarding thing I've done is simply helping a new disabled customer at work. She was so overwhelmed with the level of service she received that she wrote me a letter in a thank you card.
That card sits on my desk infront of me now, and has helped me get through some very dark times.