The DRRS is a motion dampener arm that attaches to the escape tower.  Here is a perspective drawing of the arm. 

Here is a DRRS counter weight. I used the Aviator67 parts with the addition of a small pulley.

And here they are installed. Make sure not to glue the bottom to level 320 as that is part of Section #6. On the left you can see an I-beam spanning L320 to L340. You should not glue this beam at both the top and the bottom otherwise you won't be able to separate Sections #6 and #7. I chose to glue it to L320 since the DRRS is glued to this beam and the outer beam of the swing arm support structure. This way both of these are attached to Section #6 and therefore the DRRS will be part of this section. Only the strings will go between the DRRS and Section.

I have also created and printed the end of the DRRS arm. This part is split into two parts that are glued together.

DRRS Arms: Get out your fine tip glue bottle. Instead of angling the joints at 45 degrees I chose to have butt joints that inset into the other pieces. The parts are pretty flimsy but once glued together they are surprisingly strong.

Once the arms are glued up I attached the hinges. The parts include small printed pins but I got better results with small pieces of red wire.

I then glued the small radiator loops to the end part.

Here are the arms attached.

DRRS Arm Installed: Here it is retracted. The cables are not yet attached.

And here it is with the cables attached. You can see the drain lines that hang under the arms.

The DRRS Arm is now complete. Here is a final picture of the tower with all its little doo-dads.

And here is the business end of the arm.