Semroc Mars Lander possible build.

I got this rocket a few weeks ago.
I open the kit(it was factory sealed) inventoried the kit, and found it missing two of the "ball bearings" for the legs.
I was planning to build it like I did with my Kosroc kit I built twenty years ago with the modifications of the steel springs and "D" power motor mount.
I spent the last two and a half days searching YORF for issues on this kit build and was made some notes to some problems.
Some people changed out the rubber hinges for Robart #307 hinges.
Question?
How are the hinges attached?
I can't find any pic's showing this modification.
Also, how are the springs attached?
Any help would be appreciated.

BTW, Semroc's kit is beefier than Estes.

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If it flies, I can crash it!