MY main intent is to help those less well off and with shortened life expectancy.
You may ask why bother
I don't ask 'why bother?', I totally get it, I think what you are doing is brilliant and wish you well with it.
SO if I have upset or offended etc I can only apologize but after 5 or 6 years of doing this you get jumpy as 95% of the time your ridiculed ignored or told to grow up because its Star Wars.
I for one am not inclined to ridicule you for that, quite the opposite as above. I am 59 and still enjoy things like Star Wars (not my favourite, but still enjoyable). Mostly all folk here are bothered about is helping with the project, not whether it is 'childish' or whatever, I don't think anyone cares about that. However, to help we need a clear description of what you are doing, which was my frustration in my first reply.
You are in Leicester, is that correct? I am just north of Nottingham (M1 J26) and I might be interested in the electronics and software side of what you are doing because, really, I think it is a good thing you are doing.
You've had some good advice already from others.