The two jet engines extend beyond the back end. The front of the intakes are a partial circle. The back of the tubes are full circle and notched to overlap the end of the main body.
Four tries (and 40" of scrapped BT-5) gave me a workable design. These tubes might also help stabilize the model.
On the next prototype the engine hook will be on the top side, away from the BT-5 tubes.
You might notice the underside of the BT-50H is rough. I've cut off four intake tries and had to sand off some glue.
The decal draws are turning out very well!