Hi guys I'm a noob to quads and bought a toy grade just to get me started. The XK had great reviews and I ordered one from ebay, took a month to arrive from China and against my better judgement took it out in to the garden for a brief flight when the wind had dropped enough. Cut a long story short the quad drifted into a willow tree and I snapped a blade. Luckily it came with spares but I can't get the screw to bite, not even with the original prop. It's goes in fine without prop so know it hasn't stripped but without excessive force that could break gears I don't know what to do. Any suggestions would be much appreciated.