I been running an APC 16X8 on both of my DLE 20 sand have been very pleased. But I just assembled and started flying a Pulse 125. Not a lot of prop ground clearence. I switched to a 15X8 APC and am now turning 9300. Is that too much for my DLE 20s??. The manual/paper work does say 15X8 props but it also says 9000. Am I going to damge these little rascals? Thanks Brian Smith