Mule, It looks like you have not done any filing of the butt plate mating surfaces. They need to be done first before inletting the butt plate. Once you have, you can look at the butt plate and see if it will fit after filing to fit. It looks to me like the butt plate needs to go forward and wood needs to be removed in the middle of the butt. Fitting the butt plate is really not that different on a precarved stock than it is on a blank, you just have less wood to work with.