MPC USS Enterprise Build, Part 4, 24mm Engine Mount Part A

To make this a 24mm model, there will be a lot of plastic cutting and grinding.
The low end of the fin can (left side) will be widened and the interior ribs (right side) will be cut back.

The locking engine cap won't be locking when I get through with it.

If you cut through along the recess line you will remove the interior support tube, shown at the bottom of the inset.

Sand the new larger hole round with 100 grit wrapped around a dowel.
The inset shows the BT-50 heavy wall tube slid into the new hole.

After englarging the 18mm hole in the fin can to 24mm -
The interior ribs were cut back with a very old Dremel tool with a sanding drum. The plastic was more melted than actually sanded.
I removed only enough of the rib width for the BT-50H tube to slide in while still resting and being supported by the ribs.
I can't imagine a hot Quest engine beside the ribs. I would think they would melt! The BT-50H tube will give better insulation.