Thanks to everyone for the welcome. Really nice to get so much feedback and support.
I am definitely going to be on a steep learning curve. I have been reading the threads and some of the skills are quite incredible, seeing TechAUmNu PCB design for example.
With a bit of luck my ESC arrives Monday (got a mystery delivery email confirmation - no sender info) but unless it's for my wife it must be my ESC. But today is about clearing space in garage. Gumtree watch out.

One more thing - seen various folk using CAD to get design right avoiding clunks and so they can order prefabbed/pre-cut parts. Has anyone used OnShape? I have had a play and it seems quite capable, but I haven't used CAD before. Last time I did 3D modelling it took my Atari ST 2 days to render one frame - lol - that was only the early 90's now its in the damn browser in near real time!