The first thing I would do is get a few tanks of fuel through it to break it in. Then gradually start leaning the needles. I was surprised just how rich the low end was set on my .82 from the factory.

As for the plane wanting to roll away at idle, that seems to be a common thing. The big props make a lot of thrust and even at lower RPM, the plane can want to move. Once the engine is broken in though and the needles adjusted right you should be able to achieve a much lower, reliable idle which will eliminate or at least make the problem much better.

Just be patient with the engine. It can be a little frustrating when new but you'll be rewarded with a reliable, sweet runner in the end.