Well, here it is
Weighs 0.4g without leads, 2.3g with leads. Even includes a tiny green LED which may not be of much use in the cockpit bit offers some testing validation.
Here's a bunch of photos to whet your appetites already
The sloping mound where the 2 pin short plugs in is actually just heatshrink, so you can be pulled back so the whole unit sits very flush against the inside of the fuselage and you'll only need two very small holes.
Quiescent current is 7.7~8.0uA ( about 4 years to discharge a 300mAh pack )