ScaleAndTile3 is a little java program written by Bill Segraves a rcgroups member.. If you contact him through the groups site he will email it to you.. there are two versions, one is free , and another has more functions and for this one he likes a donation to his charity..
Ive reviewed the free one here
http://www.rcgroups.com/forums/showthread.php?t=1560478&page=3
Is the 180 gms the all up flying weight including its battery? If yes then thats a very good weight ..and at just under 3 ozsqft it will float nicely.. the hextronic motor will give somewhere near 14oz thrust on three cells that is plenty of power for a light model..
going heavier for 4ozsqft .. 246gms.. still will fly fine especially outdoors,
although for indoors lighter is better
The most important point when first flying a nutball... throttle it down after take off, and fly on the
lowest throttle you can manage.. with more throttle they are HIGHLY maneuverable and quick responses are needed..