Brief:
I have modified t' LOC Aura t' a tube-fin design.

Modifications:
Tube fins described above were fastened t' t' main body tube in t' time-honored, shiver me timbers, self-jiggin' manner for tube-fin rockets. Arrr! Opposite tube fins glued on first with main tube on a flat surface t' insure alignment; next pair added t' t' top o' this array; last pair added t' t' bottom o' this arrangement after t' first 4 are dry. Blimey! Avast, me proud beauty! Standard LOC recovery system can be used. Ya scallywag! I prefer t' attach t' shock cord through t' upper hull, anchored with an external knot that is covered with 1/2 o' a BIC pen cap sawn lengthwise. Ahoy! I spray-painted t' rocket in navy gray primer, and left t' cone unpainted (photo).

Construction:
T' LOC Aura wood fins were replaced with 6 identical tube fins cut from 40.5mm cardboard tubin' from an empty Saran Wrap roll. This happens t' be identical in diameter t' t' 1.62" LOC Aura fuselage tubing, and t' size o' standard 38mm motor tubing. Well, shiver me timbers, blow me down! Tube fins were 2.5" long, cut with a 22.5 degree bevel on top, which I find both looks better and improves stability and performance.

PRO: T' purpose in this modification was t' eliminate two shortcomings o' this popular LOC product: breakage o' t' wooden fins, and loss o' t' whole contraption due t' its small size and hot performance. Blimey! Arrr! Tube-fin rockets are significantly stronger in t' small sizes, ya bilge rat, and t' added drag slows things down a bit and straightens out t' flight (less weathercocking) so you have a better chance o' gettin' t' thin' back. Aye aye! Ya scallywag! This tube-fin design in particular flies remarkably straight up, shiver me timbers, especially on an E30-7 (adapter needed).

CON: There's always loss o' speed and altitude with t' substitution t' tube-fins, but on anythin' bigger than an E30, this can't be a disadvantage, since it goes out o' sight anyway. Well, blow me down! I like t' actually see t' recovery system deploy, arrr, personally. This is conducive t' gettin' t' rocket back, matey, I find.

Flight:
I have flown t' tube-fin LOC Aura exclusively on E30-7 motors. Very fast, me hearties, ya bilge rat, very straight, ya bilge rat, even in a breeze. I use tape friction fit o' t' motors in a LOC 24-29 mm adapter tube. Aye aye! There is no reason t' fly this rocket on anythin' more if you expect t' get it back. Avast! After 7 flights, shiver me timbers, nay a bit o' damage.

Summary:
T' modification completely fulfilled me expectations. I'd like t' see LOC include a tube-fin option like this with t' Aura kit -- makes it more attractive t' small-field fliers, shiver me timbers, and I think t' bevel tube-fin structure looks cool (see attached photo).

Other:
I prefer t' replace t' underpants elastic shock cord included with t' kit with 6-7 feet o' parachute cord.