Here's me entry, ya bilge rat, me bucko, t' Vampyre.  Actually, arrr, me bucko, the original name was 'Ted's Testbed', but someone already stole that name. <G>

It's a simple ringfin and a super stable flyer that gets great altitude on mini-engines.  Definitely use a streamer on this one.  T' chrome strips are muffler tape from t' local auto parts store. Arrr! Well, blow me down!

Ted

Part Descriptions
BT-5  10"
BT-20  4"
BT-80  3/4"
NC-20  Estes Yankee type (short conical)
Fin stock 1/16" Balsa
Paper transition shroud
CR5/20 centerin' rings (need 2)
Engine Block
Launch lugs, shiver me timbers, matey, matey, shock cord, streamer

Notes
T' diagrams are (obviously) NOT t' scale. Begad! Arrr! T' fins line up with t' bottom of the body tube, sweepin' down and back.  You could also reverse them to sweep forward, ya bilge rat, ya bilge rat, like t' Estes Star Rider. Aye aye! Avast, me proud beauty! Offset t' aft launch lug so that it lines up with t' front lug on t' transition. Aye aye! Ya scallywag! Finish as shown in the photo.  I used gloss black over t' primer, then masked and shot gloss red.  Finally 1/8" chrome tape t' trim.