"dwhorn" I still monitor this thread for any new entry or comment and I was very glad to find yours!

As previously commented, I own one original Appelbaum kit as well as the Thacker foam plans. I have never compared the proposed C.G. positions for each design, but as you are working from the Thacker plans I will take a photo of the Appelbaunīs one and will post here so you may compare. I am quite sure they will be very close and both quite safe knowing the designers!

Unfortunatelly I will be out of home for some weeks as I have to assist my elderly mother in South Spain and I keep my "model hangar" at my home in Madrid, so I will only able to post the photo when I am back ato home. In the other hand, I will be very pleased to see photos and details of your model.

Best Regards!