Just received my order for these Carbon Fiber jobs from an eBay seller. Item # 251940172735 First 2 things that I notice: #1 - Props are REALLY STIFF! Not bendy like the OEM props (good or bad?). #2 - They have an aluminum threaded hub. Thought this might really be a big + since plastic threads can get stripped out if you simply use them too much (taking your props off and on). Additionally, they feel somewhat heavier; haven't weighed them yet, but will. Anyone have any experience with these? Good or bad? BTW, the avatar that I just posted was a pic that I took this winter down on Sanibel Island. These 3 cheerleaders were "practicing" right in front of us!! WooHoo!