Vin- If you ever saw Tom's demo unit with the clear plastic housing that is made the same as the metal unit, you would forget about ever wondering how good it works.
You aren't able to see into your wing tanks or hopper tank if they are molded and they work.
Tom and JMP test their stuff extensively before they release it for market, unlike some other manufacturers who use us modelers hard earned money to work out the bugs instead of a comprehensive test program
Bolt it on and forget it.

Later
Marty O