I just got a Hydro with an OPS 15cc (90) motor in it. I have done a search and cannot find much information about the care and feeding of this motor. My questions are, 1) How much Nitro can I run in it? 2) What RPM should it run at? and finally 3) What is a good Glow Plug to use in it? It has good compression, and runs nicely on 15% fuel. Thanks in advance for any help.