So I weighed the mustang (wings, fins, fuse, control links, firewall, gear, wheels, OS FS 70 engine, and five servos @46gx5). My RX and RX bat are installed in a 80% finished J3 and didn't feel like taking them out. The scale I used is accurate enough: weighed a few 0.5 to 1 kg dumb bell disks on it. However I did weigh one standard servo at the grocery store. I'm so bad... but I put it in a baggy first

So that so far comes to 5.8 pounds. The Hangar 9 PTS is 6.5 to 7.0 lbs flying weight (not dry apparently). The different vmar P-51 was 6.0 to 6.5 lbs dry flying weight. So I guess that means that the H9 PTS and similar engine specs are usable.

It's nothing special as ARF's go but the fins and wings in particular look and feel like they are nicely constructed. Covering needs work... wrinkles [:-]

Thanks for replies