Doing a bit of fettling on the BB over winter. Always had a charging (green) / not charging (red) light but wanted to fit a voltmeter. Never could find a good place to put it. I don't know if this is old news but I came across a bracket on ebay for mounting gauges? It's worked out nicely. Quite pleased with it. (Only for FIs though.) Just remove the two ignition barrel bolts and it slots straight in. Putting some USB points on the right.