Hi To all,
Being a plastic technician all my life I would like to add that polycarbonate, the polymer that will be used for the RC10 clear re-issue is one of the toughest material among the variety of know plastics. Some of the applications for polycarbonate are motorcycle and snowmobile helmets, clear bullet proof glasses, etc. It is tougher than acrylic and can be either clear or colored. It's a ductile polymer meaning that it will not chatter like glass but it is rigid although a bit pliable. The original RC10 plastic parts were made of nylon. Now, since that time, you can find glass or carbon reinforced (toughfened) polymers. Adding such additives render them opaque so this is the reason they have chosen to use clear polycarbonate.
They are only a few clear polymers available. The others, like clear polystyrene are very fragile(used for clear windshields in plastic model kit). Another candidate is PETG which is used to make all the clear water bottles, clear soda bottles(Coke, Pepsi, 7-up, etc). However it is harder to inject in plastic molds.
The only drawback to polycarbonate is it is easy to scratch and is affected by petroleum products. It takes a while but it does. They found this major flaw on the first plastic snowmobile hood made of polycarbonate when the gas tank was located right in the middle of the hood at the front. At minus 30 degrees when people were filling their snowmobiles they were spilling gas around the gas tank cap on the hood. Then after a few seasons the polycarbonate hood would suddenly break of quite easily from an impact all due to gas contact affecting the polycarbonate making it brittle.
So I'm mostly recommended that only silicone fluids should be used for the transmission and in shocks not any regular oil based grease or oil. Silicone fluids does not affects polycarbonate and neither black o-rings(nitrile rubber). That is why you should only use silicone oils for shocks. Orange o-rings are made of silicone so they are 100% compatible with silicone oils.
Sorry for this long post but I though that would help you understand the Associated polymer choice.