Well,those green tips are maybe a little beefed up but I am trying them with a D97 skinny,padded loops,string and boys this is a whole new story.Those reinforcements in the limbs make the limbs sure with this kind of low stretch material,I hope.Anyway I am trying that string with a pair of beated set of limbs and the performances has improved a lot,still the bow is quiet but mach faster and it needs a much stiffer arrow,I can say 3 or 4 spines.