I broke down and bought the Sorby hollowing tool.(had a 25%off coupon from Rockler on monday and put it to use). Here is my first ever attempt at HF. The opening started at 1 3/4" but after two minutes with the tool I came out the side and the rest is history, The bowl is 6"x 3" high and the opening is 3 1/2" spalted maple. As usual comments welcome. I also have aquestion how do you Hf turners turn your bottom after hollowing?