Ditto on the glow plug and fuel line flush.

Take the glow plug off and hook it up to your battery. It should glow a very hot yellow with no crushed wires or touching coils. Sometimes a careful separation of bent wires will help things out. If it can not be saved, stock up on a few more from your LHS. I have found a bad plug to almost always be the cause of my problems similar to what you have described.

Take the needle out of the carb and the fuel line off the tank. Flush fuel backwards through the whole works. While you have the needle out, make sure there are no marks or grooves in it. If the needle has been over tightened, the resulting ring or step in the needle makes it almost impossible to adjust properly. If the needle is damaged, throw it out and get a new one. Just be careful not to over tighten and you should never have to buy a second needle. Trying to use a grooved one is about the most frustration you can have with a LMH.

Best of luck and let us know how it goes.

For what it is worth,

Spiro