Quest Future Launch Vehicle #3013 Build, Part 10, Slotting The SRBs

Here's the three SRBs with the dry fitted.

Before gluing the nose cones in, line up the open areas of the wraps, as shown here in the middle SRB.

To cut the fin tab slot through the wrap -
Press the fin slot area with a fingernail.
I didn't remove a long rectangular piece from the wrap.
A single line is cut, centered down the slot. In the lower picture - On the ends cut two short vertical lines making an elongated "H" shape, like this -     I----------------I.
When the fin tab is pressed in, the long sides will fold in making a tighter fit.

Here's one of the fins dry fitted into the slot. I glued them in after the SRBs were glued onto the body.
On the very sides of the root edge you can still see the outside of the words: "GLUE FIN HERE".