I tried explaining how VisibleCabParts works under the hood here. I don't recommend using values from -5 to 5 as suggested above, since that's just a few "blind" options of the whole deal with that property.
I have some basic ideas for BAM applications I'd like to explore, so I'll probably be posting them on this topic.
For now, the first one would be Power Bumpers.
Power Bumpers are a special kind of bumper that hits almost as hard as the phrase "Power Bumpers have more than 12 years". In the "pre-BAM era" they were constructed using a complex set of table objects, but BAM allows recreating its effect pretty effectively with only a normal bumper, a Timer and some spicy code 
Be not afraid, the code is in fact pretty simple, and I also included in the demo some extra stuff: A rotating bumper which is just a variant of the same with an extra Timer, and an example in the code on how would you set the strength of the Bumper depending on the direction of the hit, just like ye olde EM-Kickers.
Have fun!