Just found this Richie, sorry to be late to the party.
I am a scratch builder and do not build kits but I am extremely impressed by your work. You referred to less able modellers in your introduction but I do not think that you are among them! I too suffer a little from shaky hands and eyesight which I would like to be better, but there are ways of getting around these problems: I use an eye loupe (magnifier which I can clip to my glasses), and ia rest my hands on my desk when I am suffering from handshake.
The photos of your models show that you work at the highest standard - as good as many on this site and better than many models that I have seen at club exhibitions. You have nothing to be ashamed of, believe me. As Lance has commented, we are our own worst critics (guess how I know).
Stephen.