Thanks for the link. Maybe you know the answer to this question, if not I'll call them tomorrow. Is the 1" ID or OD? I have the hardest time when they only stand one inside of both ODxIDxlength.
Anyways, to answer your question I would recommend the pipe foam. Once winds get to around 25mph they may start to roll. At least that is with the 37-42" big boys. I have talked to quite a few people that are using these (blkrock being one) and they all have had great success both with pipe foam and from a hunting standpoint.
Out of the 9 guys that I have talked to one has told me with the style shell he had, he had a problem with the wind getting underneath the tail and rolling it. He added I think he said a 4oz peaice of lead to sink the tail.
Now with my testing this summer, I did have it roll once, and that was when I had allowed a lot of slack in the line. I have yet to have it roll when anchored in up to almost 2' waves.
To prevent any issue I will make sets of three decoys. The first will have 20' of line, I will drill a hole on the tail, allow 8' of line then tie the next decoy on. Making a string of 3 decoys to one anchor. (I will vary the number, 2-4 in a series). Hope this helps.
If money talks; then I got a lot to say i'm on the grind trying to make a hundred thousand dollars a day! We play with big cash and we blowin money fast. I need a G for every light bulb on the Vegas strip!!!