I followed some instructions posted on the net by Rabbath himself (here) and made my curved endpin: curved in a 44º angle. I used a 3/8'' aluminum rod, which bounces a little when I play. I will change it as soon as possible to a stainless steel one. The change in stance is impressive. I feel very confortable when playing. It's a relief for my left thumb, hand and whole body. I endorse its use. However, I got a question. Look at the pic I post (it's handpainted with Photoshop, so don't make fun of it). With respect to the floor, does the rod have to be perpendicular, or (as in my case) can it be in that "funny angle"?