hey john yep sounds about right...you need to break in the engine with very rich tuning, to keep plenty of lube(in the fuel) in the engine during breakin. I did not change the settings when I did the breakin on both of my nx76's. I just yanked and yanked. I it is hard starting and cold were you aer trying to start you could use a hair dryer to warm the block, will help starting. If the temp is not so cold and it wont start very easy, you could loosen the glow plug just a crack to release some of the compression, but as soon as it starts tighten the plug back up.

Hope this helps, Have fun.