For the electrics in the H2 I resorted to some familiar components.
The Hobbywing V2 speedo is a great favourite of mine, HW have been really good at updating the software for this unit so it remains competitive and is easy peasy to programme track-side via the digital program box.
I am using a full size 2s pack in the H2 so there is no choice in mounting location, it goes on the hinged battery plate. I was a little worried that with the fan fitted it might foul the body shell. I needn't have as there is plenty of room.
Depending on the brand stubby users may be able to squeeze in the esc on the chassis behind the servo.
I used some snazzy blue wire to hook this up to an LRP X12 8.5t motor which, with modern software, should suffice for most tracks. It's a clear run so was quite straightforward.
There is room left over to mount a PT on top of the servo.
That'll do, tidy and functional, I tend not to alter the length of most wires as I often swap things from car to car, but it's an option for those seeking ultimate neatness.
Time to hit the astro, can't wait, I'll let you know how it goes.