3mtrs no problem DC you can handle that
If you look at the wings spread pic that Q took of me I am just under 8ft on bocks and my wings are a good 2 ft above my head so the dragon was 3mts high
The problem was the wing span as that came out about 15ft(4.5mts apx) and that did catch the wind
Get yourself along to a shop that sells carrymats cheap (Camping mats) you can roll the horns out of them and they will be light
Unless you have a horse feed and tack shop near you then get some of the stuff I used it is light and tough and can be glued cut and molded with a blowlamp
I can't wait to see this may have to have another fancy dress up in london soon (maybe a Christmas one)
Jason