Hi! Quite recently I have been imagining a node cutter in the tuning menu. Basically this would allow for cut fenders, cut bumpers, custom cut hoods, cut doors, cut cages..... You get it. This feature would be a click-and-drag feature where you draw the line for what you want to cut or remove from the vehicle, and your cut will either be snapped to the nearest node or new nodes would be created. I do not know if the game would be capable of this idea, but what the heck, might as well drop it out here. Here is an example: The mouse-drawn line: The nodes cut and finished (as you can see it sorta lines up with the beams...): Tada!
While I know what you are talking about and while I think it is an interesting idea (finally, an idea that hasn't been suggested 300 times already), I am going to save Nadeox1 some time and tell you that unfortunately, with the way that Beam handles the loading of JBeams, the JBeam structure can not be edited on the fly. So to implement this feature would require the whole loading system to be rewritten.