Enerjet by Aerotech Strong Arm Build, Part 24, Engine Retainer

The inside edge of the motor retainer should be roughed up for better epoxy adhesion.

I used the back side of my knife to scrape off the paint. Using the back of the blade will rough the surface and not dull the sharp side of the knife.

The fit of the ring is tight.

To make an easier slide in and seat, the edges of the motor tube were slightly rounded with some 320 grit sandpaper.

Here's the ring slid in until the motor tube butts up against the raised ring inside. 

After the epoxy dries, the cap can be screwed on. 

The trailing edges of the fins are longer than the retainer cap so the rocket can stand on it's fins.

Enerjet by Aerotech Strong Arm Build, Part 23, Final Stickers

I'm building three of the Strong Arm kits for Aerotech and I wanted consistency in the models.

I made a template out of cardstock.

Trace around one of the fins.

Set the sticker on the cardstock setting it on a good placement.

Draw around the sticker border and cut out the square.

This is another wet sticker placement.

Set the sticker on the fin, lay the template over the fin and check the sticker placement.

Lift and replace until it is centered in the cut out "window".

These dots or screw stickers were included but there is no reference of the placement. I decided to leave them off the rocket.

Placing the stickers takes time!

I counted 66 stickers on each model!