Update - I was able to get the steel profiled to a quad zero +1 and it has solved the problems - Removing the heel lifts I had under the insoles and changing profiles has stopped the catching and chattering while stopping or turning - (less steel on the ice with less pitch.) I hope when you guys put your database together has some good information to save people like me costly experimenting to find what my muscle memory and stride have been trained with old gear. Nobody tells you ProSharp quads are already pitched forward in every article I have read - thanks for that info - I feel much more comfortable on my blades now. I know shorter radius equals less speed but for me I can certainly take quicker steps to get up to speed. Might have to start a survey to help with your investigations on player style, size, position, cut, length of blades, brand etc....Good luck and thanks again JR and Nicholas