soupaw

Got an SBE I and have a few questions: 1) What is the thread size for the front bead? 2) Do the drop shims for the SBE II fit the SBE I? 3) Do they give me greater range of drop? Questions 2 & 3 relate to a problem I have when shooting buckshot on deer. The pattern always strikes high and I'm looking to bring the pattern down. Question 1 may help solve as well, the bead broke and I was considering using a larger bead to bring the pattern down as well. Thanks for any light you can shed on the problem.