Trusses and tubes should have interior nodes

[i dont know how to forum]

I've had a quite a few cases where I find myself wanting to stick something inside the open space of a truss or a tube, but the lack of nodes to attach to limits my options. I've also found myself wanting to create interstages without sealing off the top with an engine plate, and tubes would be perfect for this. I believe both trusses and tubes would both greatly benefit from having interior nodes available, much like cargo bays and saddle trusses. There's plenty of open space within these parts, just begging to be filled.