I think it cycles I went from severale failures then the last 3 bows came in perfect tiller & right weight they where all first time designs, but the difference for me is I started putting time frame on the back burner and payed attention to micro details when I put a time frame on a bow I tend to push threw and miss things, I think working on exspermental bows and changing designs keeps your mind and skills sharp , also well thinking out the design before beginning helps eliminate mistakes for me , failures are not a slump for me they just show me I missed something & If I'm just chasing speed I'm over looking design details in the end it's about enjoying the journey !