Estes Indicator #7244 Build, Part 4, Fins & Adapter

Here's how the two piece fins will glue up.

There are six fins total, two pieces per fin.

Glue these up against a straightedge. I like to set some small weights on the glue joint seam so both pieces end up flat.

The upper fin root edge is glued to the body tube - 

The root edge on the low fin is angled to fit the 20/50 adapter. 

Speaking of the adapter - There is a tie down loop on the top.

I would think this might stop the ejection charge. Except for an open rectangle space under the tie loop, this seems like a blockage.

This question came up on a forum. Estes replied that it doesn't impede the ejection charge or deployment of the parachute.

I cut the end off using a razor saw. 

Here's the new open top end after rounding off the rough sawn edge.