Thanks for going to the trouble of looking this up Mike. The only problem with dexedrine is that over time it loses its effectiveness due to gradually blocking the receptors necessary for adrenaline and various other biochemicals to function. This will lead to a general state of relapse and a sudden return of ME/CFS symptoms. Not nice
I've found that careful attention to my diet, maintaining some level of exercise and generally pacing myself so I don't over extend myself mostly works for me. I have regular B12 injections which I've found to be helpful too. Most of the problem is that I'm getting older and while my general test results, blood pressure, cholesterol & etc are very good and on paper at least my state of health is better than most women my age, the simple fact is that what I used to do ten years ago is a darn sight harder now.
I'm not giving up though. My daughter is very encouraging and I've been helping her a little with her own projects. A member on another forum contacted me recently to tell me about a small, but important detail to do with the drive arrangements on the French cyclecar I've been building a replica of. So I'm still maintaining a level of interest in things mechanical despite being fatigued.
Buba, - thank you for your good wishes
I think once we move on into Spring and the stormy weather is behind us I should do better.