Harold, I think you'll be very happy with the Asuka kit. I've built two of their Sherman's and liked them very much. The only real problem I had was with the little pieces of foam they want you to use to allow the bogie suspension arms to work. I just could not keep all three pieces in position while I added the other items that need to be enclosed in the bogie unit housing. Instead I used the plastic spacers that were supplied and glued them in position.
There are some small parts that really add to the detail of the kit, but since you just finished that 3" gun, you shouldn't have any problems with those. I'll be interested to watch your progress. All the best, John