Name this tube Fuselage ?????

[Speeddemon651]

I was given a tube fuselage and for the life of me can't figure out what is it. As you can see, all I know is:

Tube construction
Looks to be aerobatic stressed
Removable one piece spar section ?
Single Seat
http://eaaforums.org/attachment.php?attachmentid=4442&stc=1
http://eaaforums.org/attachment.php?attachmentid=4443&stc=1
http://eaaforums.org/attachment.php?attachmentid=4444&stc=1
http://eaaforums.org/attachment.php?attachmentid=4445&stc=1
http://eaaforums.org/attachment.php?attachmentid=4446&stc=1
http://eaaforums.org/attachment.php?attachmentid=4447&stc=1
http://eaaforums.org/attachment.php?attachmentid=4448&stc=1

[DShinn]

looks like a Rihn DR-107 'One Design' There is a good group forum https://groups.yahoo.com/neo/groups/onedesignforum/info

[Richard Warner]

About 30 or so years ago, I bought a bunch of J-3 and PA-11 stuff up in Circle Montana. Along with all of that stuff, there was a fuselage that looked almost identical to your pictures, except the back end was from a Super Cub that have been removed at the factory longeron splice and a bunch of tubing had been welded in the front. I asked what it was and the guy up there said the fellow that was doing the work on it was making a biplane out of it. When I first saw the picture, it looked like an identical twin to what I have, except for the vertical tubes on each side in the second bay from the front. I still don't know what it goes to, but just thought the pictures were so similar to my fuselage frame.