^This. I've been away from my tablet, which has delayed things from a modelling standpoint. JBeam is slowly assembling itself, but nothing groundbreaking as of yet, other than the suspension bits have stopped crashing the game. Expect the interior to arrive next.
GregBlast's tool makes jbeam structures way easier but it's harder to edit the jbeam with notepad afterward IMO. I think it's worth it. Back up your stuff before you try it though.