Thor Able Carded Build Part 3 Internal Rings

You are given the choice of leaving on or cutting off the Gimbal Motors from the bottom of the B3 Lower Body piece.
Here I'm scoring the fold lines with the rounded back edge of a razor blade.

I decided to leave them one - for now. Later in the construction I found they got in the way of the BT-5 tube extending out the back.
The Gimbal Motors were very hard to fold when left attached to the cardstock tube.
I ended up cutting them off later in the construction.



The internal support rings were dry now.
A BT-5 was centered on the rings and drawn around with a sharp pencil.

Cut our the center rings first leaving the rings on the cardboard backing sheet.







Sandpaper was wrapped around a dowel and the center diameter widened to friction fit a BT-5.






As you sand, some of the cardstock will roll out and make a ridge.
TIP: I decided to keep the rough ridge for a larger gluing edge on the BT-5.
The rough ridge won't be seen inside the finished model.