Well, now that I made my brass pivot hinges and got them installed and had to narrow up the boom to make it fit on the A3 hull, the turret wont fit back between the boom arms. I went to the Sherman forum for some help and discovered the likely reason is probably this M32B1 kit I got was scaled up from an Italieri kit or Testors kit of this subject piece. They are known to be out of proportion for the boom and turret, being too wide. I was given measurements of the boom and mine is really close, but the turret unit is way too wide. I need to remove about 14mm from the width. That's 7mm on each side, and then put the side walls back on. Sigh, that's going to be a hack job so I might set this aside yet again for a little bit while I contemplate the job...