landing gear question

[Billduster]

Hi ,
Im new to the forum and new to the biplane business. I just bought a SA300 in need of some tlc. I am in the process of changing the bungee's and noticed a piece of rubber zip tied in between where the landing gear contacts the airframe under the bungee's. Is there supposed to be a rubber cushion there or should it be metal to metal? I am reading as much as possible to gain knowledge on this a/c. Do I need to buy builders plans to work on this?
Thanks
Bill

 

[Lotahp1]

 

[glenbecker]

 

[Billduster]

 

[navybipe]

 

[Lotahp1]

 

[MTChris]