If it was pinched, it should have resistance when close to TDC. If it was a light pinch, with no metal scratchiness at TDC, then it should have a lot of compression, and should push back when spun past TDC. Turn & hold the crank at the compression point and place the engine body at a 3 o'clock position. If it has good compression it should hold the engine case at the 3 o'clock. If the compression is low, then the engine will continue to turn and end up at TDC.
Kyosho, Mugen Seiki, Maxy's Fuel, KO Propo
O.S., Ninja JX, Novarossi, RMV