The new design nose cone was pretty clean, the seams didn't require any filling, just sanding until smooth.
The right side shows the engine mount in the BT-60 main tube. The end got a shot of filler/primer to fill any remaining tube seam.
The two part "S" rings were cleaned up, but not too much sanding. You don't want to decrease the diameter and fit in the upper BT-20 Part "V" tube.
The rings center the plastic nozzle in the rear of the tube.
I had to scrape off some of the paint on the small end for a better glue bond.
Here's the dry fit of the upper engine.
TIP: Don't glue in the nozzle assembly yet, it's easier to spray paint it black separately and glue it in afterwards.
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