16mm battery loco

Back in June I reviewed an IP Engineering basic chassis kit for 16mm.

http://unnycoombelala.blogspot.co.uk/2014/06/a-salt-and-battery.html

Over the last couple of days I've played about wrapping something around it.
This is a big learning curve.
1. On say an 009 kit/build, you just need to worry about where the motor will fit. Here there is the issue of motor, power and control all on board.
2. It's heavy. Not lead-heavy, just so much bigger even with a tiny prototype

This is only a small Hudson 20hp style shape, and yet it is 5" long. I wanted to keep the cab clear so ended up mounting the battery box on the underside of the bonnet top. More thought process - you need to be able to change the batteries so there has to be an easy entry. This gives a high bonnet, but as can be seen against the Coopercraft rubbish wagon, which is a pretty small vehicle itself, not that tall at 50mm which is a bit over a scale 3'. I've sketched the cab out at around 95mm high. Next technical problem is getting the switch wired and put somewhere. Though where that somewhere is, is another question altogether.