I have a few questions about this kit, and the Sherman Minutia Website surprisingly is lacking on their information about the Chrysler M4A3(76)W

1. When were the shortened (only in front of the periscopes) bullet splashes in front of the driver's hatches introduced?

2. The website says the forward antenna socket of the T23 turret started to be not milled out "fairly early on". In which month of production did this occur?

3. The kit has the armored cover over the ventilator between the driver's hatches. The website says this was introduced in August 1944 for the M4(105) and M4A3(105). Would the timeframe have been any different for the M4A3(76)W?