If you look carefully in the middle near the rear of the Blakes 7 Ore Carrier, you may spot that busy part is comprised of two parts from the Airfix/MPC X-Wing kit.
I had them from the last time i attempted to build one of these but, alas, it was from a part-built kit that i'd bought off the 'Bay.
Pic 2: Trouble is, i only needed one half of the engine and the original owner hadn't exactly been sparing with the glue, meaning things were stuck tight.
Pic 3: So i got my Dremel out and crudely cut off the rear engine parts that had been stuck on, then very carefully cut close to the join between the two halves.
Pic 4: After that, i just sanded down to the join line.
Pic 5: And here it is joined to the other X-Wing part, which is the forward section of the engine assembly, glued horizontally. There was a fair bit of glue residue in the bottom of this piece, so i've covered it up with some corrugated Plasticard.