Looks like Hoffman identified all the parts.
It looks as though Rubicon are including the initial British-pattern sand shields in sections so that the rear sections can be attached to the rear deck to hold stowage (some units did this, especially in the Mediterranean). If so, that's very ingenious.
The kit seems to include a late version of the exhaust deflector, but I can't see the earlier version (i.e. the same as the M10 has). I hope it's going to be on another sprue. It's also unclear whether the hull is the early production version with direct vision slots in the glacis, or the mid-production version without.
Hopefully the kit will include both 75mm and 76mm turrets - and the 75mm turret will include the initial M34 gun mount with the narrow gun shield. The late 'large hatch' hull would also require the later 'high bustle' 75mm turret - which would mean including 3 turrets! As 75mm-armed M4A2s didn't have 'wet' stowage, it should also have (optional, not moulded-on) hull appliqué armour.
A lot of M4A2s (especially Soviet vehicles) had steel cleat tracks. It would be good if the kit came with these. It may be easier to mould the tread detail too.
Potentially, the options are:
- Sherman III, as used by the British Army in Tunisia (but only if it has the early hull and M34 gun mount) as well as Sicily and Italy. The mid-production hull was used in Sicily and Italy - many still had the M34 gun mount. The mid-production version was also used by the British 8th Armoured Brigade and 27th Armoured Brigade in NW Europe.
- M4A2 ('small hatch'), as used by the US Marines (from November 1943) and the Red Army. Most if not all of these were mid-production vehicles.
- M4A2 ('large hatch'), as used by the US Marines (in small numbers) and the Red Army (the British don't seem to have used them).
- M4A2(76mm)(W), as used exclusively by the Red Army.
However, that seems over-ambitious - I can't see Rubicon being able to squeeze so much into a single box. If I were Rubicon, I'd only include the early 75mm turret and the 76mm turret, as the 75mm 'large hatch' version is the least important/useful M4A2 variant.