You have to decide whether to use a 18mm four engine cluster like the original kit or go with the simpler 24mm engine. According to the face card, a D12-3 will get it to 220', a D15-4 to 325'. 220 feet seems low and then have time for a chute to open.
The four engine C6-3 engine tops out at 600', a safer bet if you can get all four engines to ignite. I'm going with the four engine cluster option.
Semroc chose the thicker walled (Centuri) ST-7s for the engine mount tubes.
A small knife stab was made at the vendor for the upper engine hook bend. I always widen the small cut from the opposite side squaring it off and making the notch stronger.
A 60 lb. card stock piece is glued over the upper end of the hook to hold it in place. TIP: While the instructions mention you can use masking tape, I wouldn't recommend it. Masking tape can degrade and flake away over time.
The engine mount tubes will be glued side by side so the width of the retaining paper piece is important. It shouldn't overlap onto the adjoining tube. Cut the four pieces to 1/2" X 1".
Set the tubes side by side with the two engine hooks at 90 degrees to each other. Draw a line down the tube where they touch.
Apply glue down the line and tack the tubes together.
You can use the lower cap ring to help align the tubes while the glue dries. Don't glue the cap ring to the engine tubes, just use the four hole cutout dry as a guide to hold the alignment.
Build time this post: 0 hour, 30 minutes
Total build time so far: 42 hours, 00 minutes
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