Jaeger - the Marines in Cape Gloucester didn't use the early production M4A1. My point is that most if not all the M4A1s in North Africa had direct vision ports.
I'll try and explain the point another way. The Shermans with M3-style bogies were the initial production run, most of which was rushed to North Africa (the British got 200 of them). The M3-style bogies were replaced at a very early stage in production - they were inadequate for the weight of the M4. They disappeared before the direct vision ports were eliminated. A couple of the early M4s with 1st Armoured Division in Tunisia in early 1943 already featured the M4-style bogies (the cast transmission housing was appearing by that time as well). Most of the early Shermans with M3-style bogies were knocked out in 1942/43 - the Americans lost a lot of them in their initial encounters with the Afrika Korps.
So, unless the M4A1 kit includes the hull with direct vision ports, the tracks with M3-style bogies are largely irrelevant (to anyone who cares about historical accuracy). If I've understood Rubicon's last post correctly, and their M4A1 kit will only include M3-style bogies, the kit will represent an extremely rare vehicle.
Without the hull with direct vision ports, it won't be possible to build an accurate version of the Shermans that fought at Alamein or with the US 1st Armoured in Tunisia in late 1942/early 1943. Which, I would have thought, was the whole point of including the M3-style bogies in the first place.