Need help with Vulcan springs

I did a little research but can’t find anything very helpful. Team 3134 is looking to do something like THIS only to lvl 3 HAB.
We are thinking about using Vulcan sprigs and not surgical tubing to retract the “legs”.
First… these things kinda scare me… I would like some good pictures of teams that have used them (how they attach and the winding drum used). I have some sh12p39 ( 7.8lbs) and some sh16p40 (10lbs)
thanks