I much more greatly prefer Centuri/Semroc ST-10 to ST-8, simply because there's more room to attach a Kevlar shock cord anchor to the motor mount.
Hence, my "slightly bigger than before" version of this rocket. I included a color kitcard photo from scigs30's build of the original model.
EDIT: I just added the fin patterns that I redrew in Paint Shop Pro.
Centuri Italian Sea Killer 1.15X
SEMROC Parts List
BC-1039 Nose cone 3.90 L
ST-10120 Body tube 12.00 L
SE-14 Extra large screw eye*
LL-130 Launch lug
EM-710 Engine mount
ST-730 Body tube
TR-7 Thrust ring
2 CR-710 Centering rings
EH-20 Engine hook
2 Birch dowels 8.25 L x 1/8 dia.
4 Birch dowels 1.18 L x 1/8 dia.
3/32 T balsa fin stock
* SE-14 extra-large screw eye is nose weight to insure stability.
A8-3 - 1.54 calibers
B6-4 - 1.41 calibers
C6-5 - 1.10 calibers