Haven't tried these yet, but I'm confident they will produce. They may have to wait until next Spring to get tested.
Steve Gibson likes to cut his marabou tails somewhat short and thick. I've left most of mine a bit long for now, and can trim them in the field if necessary.
I tied a variety of colors, since I had 5 shades of the Diamond Braid. Wish they sold the gold locally!
Black Pearl
Olive
Pearl
Chartreuse
Silver
I used Clear Cure Goo, the thin version, instead of epoxy. It made tying these go fairly quick!