hi arch,
had 6 flights today to trim the model up and set a few mixers , minimal knife edge mix and a tad on of down at low stick on the throttle, regards
to the tail tube you are spot on , could do with being a little longer as i drilled 3m in to mine and run cap heads, to be honest i have just orede another one this week , they are great value for money and a great model , the composite wings are out very soon and will fit straight on to the planes we own , so that will be a must to try.

regards
steve