I made this spybait yesterday.
It is Azek PVC trimboard, 3 1/2" long, 1/2" thick, 5/8" tall, and weighs 16 grams. I had to add 5 grams of lead ballast, split in front of and behind the belly hanger, which is a Spro swivel.
It falls at approx. 3/4' per second, which seems fine to me. The factory baits from Duo Realis fall at 1" per second.
I painted it with Wicked White as a base coat, Wildlife sparkle white over that, yellow sharpie for the stripe down the side, and then Createx med grey over the shoulders and back.
Once I'd heat set all the paint, I put on a coat of nail polish with some blur/green glitter.
I heat set the nail polish, let it sit for an hour, and added the shad dots with a black sharpie.
I heat set them, and then did one dip in AC1315.
No wrinkling or any other problems.