Hi Yuhina, Thank you for your responce, i am still enjoying this thread and feel we are on the right tracks, to discuss Speycasting mechanics, please let me say i totally understand the casting mechanics in casting a lever and spring. I would like to go back to my question on underhand being the best way to flex a lever and spring ?, bearing in mind most of the power aplication is in the lower hand. I would also like to discuss effects on lever and spring and power applications in position. Please let me know your thoughts. I know we are getting away for the original post you made. Thanks Gordon. DTX Pro Staff.