Big Tim, I got to maiden my build on the weekend finally which you may be interested in.

At 5kg fully fuelled, she needs a lot of runway. If you can take 500g to 1kg off the build weight (you would only need to take 200g off the tail and this would be achievable), this model would be unbelieveable.

CG was spot on at 90mm. Seems a long way forward but it let me glide back to the runway almost hands off the controls (motor overheated we think....needs more ventilation exit area)
Take a look at my youtube channel ssenbruns for the video of the maiden as I cant post links here.

Happy flying