The video opens with "G" sporting the awesome lab coat gift we got him from the Iron Man set. Both launches worked perfectly, and we recovered the rockets unharmed.
The first one is a a minimum diameter 38mm blue tube + golf ball nose + 3D-printed Makerbot fin can. The J270 takes this puppy from 0 to 1,363 MPH (Mach 1.8) in 2.6 seconds! According to RockSim, it topped out at 9,454 ft.
The second flight was a simpler Estes with D12 booster staging to a C6-7, with a Sharpie pen as upper nose cone/weight. The J-motor on left is 32x the D motor on right.