The thing I love about rongYIREN's creations is his ability to pack in so much great design while maintaining playability. The Thumper is something the 10 year old me wishes LEGO had produced as a set so I could swoosh the removable, remote drone around while exploring an alien planet in a bouncy space rover. That rongYIREN is able to do all this with a sparse part count is impressive, and is in keeping with the best of LEGO's own product design. Most adult fans of LEGO tend to build without thought to part limitations. We create mocs that could never see production because it would be cost prohibitive to do so. rongYIREN is that rare exception that is able to make great models without over building. Why he isn't already a designer for LEGO is beyond me. Hello Billund?