I have shot one or two and to say their flight is loopy is an understatement, the points are at least 150 grn and as you have seen a lot wider than the shafts which are 5/16. I think I will experiment with 3 , after all they don't owe me anything.
Yeah there was a step between the shaft and the Pile, worth a try as you say they are a good price, and worth a go it will be interesting how it goes