Hi, Mizuko. You're welcome to try the one seam, however in the long run, I wish I'd done 2 side-seams. Ah, well. I may make another tail in the way-far future. XD I still want a few years outta the Delphine Tail. I made a duct-tape mannequin of my legs, didn't have fiberglass. From what I've heard, though, the fiberglass is excellent stuff for tail-making! Good luck, & excited to see pictures!

As a note to you both, Thom Shouse, whom I emailed 2 years ago when I wanted to originally start the Delphine Tail (obviously it didn't get off the ground til now, lol), he recommended Dragon Skin, as the best thing on the market.