T38 is 224mm wingspan
395mm long.
The airframe is a quarter of an ounce with no radio, motor or battery. I never thought I would be able to say that, and have a fair amount of confidence that it will fly.... its whether my reactions are up to it, I will probably be best putting one of my boards in the mk2 tiny delta to get some practice first.
I am still thinking about a quick change board clip type of thing, mounted in each model, so the board can be swapped easily between them.
As it stands, with planes I have made, and others I am still working on, I dont have a board for each one, it would be nice, but as they are just spotted in with small hot glue blobs, its easy enough to move them between models. A clip in system would be good though, without the blobs. I thought about doing a 3d printed one, for repeatability, but its another added weight, doubt if I could design it to be strong enough for the board to clip in securely and be as light as 2 blobs of glue. All weight counts at this size, although I was willing to add an estimated 1.5g of paint to a 6g plane, the other 0.26g being the control horns and hinge tape strips.
There is about 18g of radio, pushrods, motor and battery still to go on, maybe a bit less with a really small battery.