I also switched this year to the drop time biscuit and wish I did it sooner. I bought the one for aluminum arrows and then switched to carbons. I have no problems shooting carbons through the larger aluminum biscuit. The only thing I have seen is the very edge of my vanes have a little black on them. I switched to boening (sp?) heavy vanes and have never had one rip off or get wavy. It draws quiet, shoots quiet and after hunting the first time with it yesterday I' m convinced it is by far the best hunting rest on the market. Switch your vanes to the thicker ones and you won' t regret it.