Better protection on the back.
Looks like a clean install.
Not to criticize, but I would be very concerned about the electrical tape wearing thru. If it does, you could have big problems and not likely at a convenient time/place.
I recommend insulating it from shorting with something more durable than electrical tape. The inner tube idea isn't bad. Perhaps cutting a piece of flexible teflon cutting board. Cheap and easy to find and holds up well to cutting with a knife, so should be quite resistant for your purpose.
"Sometimes, it's hard to look cool..."
2009 Buell 1125CR
2002 HD Heritage Springer
1988 Sporty 883 (cafe project)