@ Targor
two remarks:
1 - the vertex coordinated of the objects you have exported where offset so to center the model on the y axis, while I had it set so that cables started at y = 0. This might pose some problem when placing the unit in game. Could you re-export the balloon by keeping the original coordinates.
2 - even worst: every time I import the cables, everything looks fine until I try saving; at this point I get a broken chain error, and the saving is aborted. Tried with my original cables, and I get the same error. To know what is wrong with them now