Insulated Bus Bars

[turtle]

Ron: Cut and drill the bar with any additional length you think you want. Dip the entire bar in one of the insulating plastic/rubber dips and let dry. Now use an X-acto and cut away the the dip only where you need to for connections. Trim to fit the breaker on the one side and just enough for the screw and washer on the other. If you end up needing some more positions, all you need to do is trim away the covering for the next breaker and install it.

I really like this idea.

Or just wrap in electrical tape. It was good enough for a Piper open bus bar AD...