Looks good and seems like a great price, Bryan. I think your webbing is what is known as "grosgrain ribbon" over here. It's light, but strong stuff. The Blaze Orange color fabric is a good idea, too.

I've read many times of old salts towing warps when running under bare poles in hellacious conditions. These warps have been rope, chain, a combo of the two, and some have even slung additional drag-inducing materials onto the warps in an effort to slow the boat (like auto tires and anchors). It seems the series drogue is more of a technological extension of that idea than it is an improvement on the para-anchor idea. Will have to do some rereading about streaming warps again. The series drogue seems like it would be much easier to deploy, handle, and retrieve than several sets of long line/chain.

And at any rate, it's a lot easier to stow 75 flat fabric cones than it is a few car tires, so there's one obvious plus. Also, the cones won't make black scuff marks on the locker walls.