Mike,
the bottom of my verticle does look like that. Can't fit much of a servo in there as the width of the opening is only 14mm, and not much room to widen it. I have some time to think about it. I may use yor sketch and mount it where others have. FEJ told me the reason for the change was simply cosmetic.

Joe,
According to a turbine perfomance chart it looks like the SS is only 2g heavier than the Superbee (engine) weight, and 100g heavier than the p60. Yet the install weight of the SS is appox 1/2lb lighter than either of the other 2. I wonder, with careful placement of equipment, if balance might be achieved with the SS in the tail , without adding weight? Someone here has a tail mounted p-60 and a cg at 160 with a full UAT. My info states a cg of 130-140. If 160 is more accurate, it might be a consideration for me to try a SS in the tail. I wish it would thaw there so you could fly yours.

Cody