The "Coming Soon" kit, the Airwaker, has that interesting, thick walled 1090 body tube.
In the comments section, Anonymous said:
"About the tubing....that's likely HBT-1090, which Estes used in the early/mid 90's in a buttload of E2Xish rockets."
BAR Geezer added:
"After further research it appears that Anonymous is right re: the HBT-1090 tube. Used in the Dragonite. Specs are 1.1 in. (28 mm) also. Probably of Chinese manufacture."
This tubing has been used in the MK-109 Stingray, Dragonite, AGM 58X Heatseeker and others.
The TTW fin and launch lug attachment slots are punched, not laser cut.
Maybe the standard thickness walled tube couldn't be used in the punch process?