lol - ok - I went with the ascii art approach

I thought some sleeper wrecks dropped complete subsystems?
Apart from a few things being sourced in empire (POS modules and reactions) - it looks like it's going to be easier to construct in-situ (W-Space) rather than empire. The volume of the components are going to be far higher than the completed subsystems (currently weighing in at around 20m3).
Handy that the sleepers will be guarding the other side of what's needed for Tech3
