I should have left good enough alone...

I've read through most of the Evo .46 threads but I still have unanswered questions.

I have a Evo. 46 and I bolted it to a board and hooked up the tank. This is my first motor larger than a .049 and I used them 20+ years ago. I was amazed that the motor started up fairly quickly. I then proceeded to tinker with the low speed and high speed to see if they were set correctly. They actually seem to be in the ballpark of where they should be. I was able to run the motor at idle and transition to WOT with very good response (immediate).

Probably due to my lack of experience, I thought that there seemed to be a large amount of oil/fuel coming out of the muffler. I messed with the hi/lo needle setting, never removing the limiiters or by passing them.

I've had problem restarting the motor and I notice the glow driver's needle will sometimes be well into the green area and other times on the line between the red and green and then others in the red. I thought that the driver battery was dead so I charged it for the recommended 10 hrs again. I've since come to the conclusion that the driver is either not making good contact with the glow plug or the glow plug is defective.

My last problem is that now if I take the driver off the glow plug the motor will die when I reduce the throttle to approx. 1/2.

What is a good way to clean a glow plug?
Should I replace the glow plug?
Has anyone else had this kind of problem with their glow driver?

I notice that after running the motor for a few minute that the fuel line between the high speed needle and the carb was void of fuel and it was very difficult to prime the carb again. Is this due to heat from it running close by the head of the motor, I would say the spacing is about 3-5 mm? Should I put a longer fuel line between them so that it would be a little farther from the head?

If I were to take the motor apart and clean it, would WD40 be a good cleaner and then just run some after-run oil through it or automatic transmission fluid?

This is the last thing I need to get settled so I can do my maiden on a GP Rapture 40 kit I just finished. I just want to make sure this motor is running properly and consistently.
Thanks,
Mike Perik