Mine starts relatively fine by hand but it only starts at idle (took me some time to figure that out). Needle valve was at about 2 turns from factory (recommended is 2- 2 1/2), I need about 3 turns to get it started and then it runs fine at about 2 1/2 turns (still running in). Fuel is what I had at home: 16% nitro, 20% castor. Only tried with Enya #3 plug so far.

It runs and throttles fine for such a small engine but one anoying thing is the sloppy crank case that tends to rattle at intermediate revs (using a balanced prop and original prop nut).

I haven't tested the high end properly yet, but reports here seems to be that it is not especially impressive...
Has anyone tried with a Nelson or Turbo plug? Or maybe a Merlin plug could do the trick without modification?