It makes perfect sense to mount the electrics under that huge void you have there, the weight is negligible, the access is almost instant and there's plenty of space to do a really nice job of laying it all out.
Also, never underestimate the convenience of being able to test / fault find the electrics while being able to fire up the motor without removing the tank
I'm genuinely gutted that I'm not doing it for you![]()
I took those things into account, Chris, when I decided to put it all in the seat hump. It always made sense to put it there from an access point of view but I needed somewhere for the oil catch rank/breather bottle. As it happens, I think by putting the starter relay and the MSD tach converter (neither of which need to be got at readily) under the fuel tank, I can then fit the ignition control box, the fuse box and make a catch tank that'll fit in the remaining space under the seat hump.
I'm gutted you're not doing it too (see pic)!
In all seriousness, I cannot imagine what all this stuff is for! I'm from a world of points and condensers. There's what appears to be a Hall Effect ignition trigger and a double-ended coil (presumably wasted spark, so from the ignition system's point of view it's a single cylinder motor) and a black box (okay it's red, but you get my drift) which, I guess just controls it's advance,etc. So why the bird's nest? I imagine all will become clear as I go through it wire by wire.
I'm in your neck of the woods on Monday - to do some work on an anti-aircraft gun. Those I understand.

