Joe,
your friend should talk to some RV guys. We are everywhere. Lots of info about gear legs in some of the archives of the rv matronics list, the rv forum, and on vans website.
most 4 and 6 gear legs are wrapped with wood and fiberglass (instructions in the plans), but it is not for springiness, but shimmy while taxiing. The 4/6 gear legs are a little springy, but not excess. If he really thinks it was excessive, there could be something wrong with some part of the system (like the engine mount). Otherwise, it could be unfamiliarity with the aircraft... not difficult, but significantly different from a c172.
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