Not to sure if this qualifies as a disability, but I've had end stage renal disease on dialysis for almost seven years, and one of the side effects is "loss of mental acuity". I received a transplant a little over a year ago, and some of my ability to think has returned, but not all. I chose this hobby, because of the challenge, but I'm having a real problem finishing projects. I have so many parts made, but no complete engines. I know it doesn't sound like a problem, or one that could be solved by "just finish it", but I was wondering if there are others with concentration problems, and what they do to cope. Looking at the side effects of the medications I need to take 'til death do me part, the problem will stick around a while.