Superb piece of software by the way..... highly recommended!!!
Thanks for the suggestion and the link. Sounds like an excellent tool to use. There are others. For example:
http://www.geistware.com/rcmodeling/cg_super_calc.htm
Because I'm intending using this plane for pattern practice, should I try to get the CG as near to the NP as I can, without it becoming too twitchy??
Actually, it'd be smart to use the advice you just gave everyone. Use the software and get it's recommendation.
And then take the airplane out and let it show you where it wants the CG. Dive test. Inverted trim. Snap ability. All these things tell you more than internet keyboards can.