Info on M3's

Anyone have a pic or illustration of the interior of cupola hatches of a

Early production M3 or
M3 light, mid production or
M3 mid production with the later type curved command cupola

I'm starting a build of an early M3 stuart and I am at a lack for info. I do have the tanks in detail book but there is not the detailed photos I was looking for. The afv interior site has the later versions.

From what I can see there isn't alot of significant changes in the chassis or uper hull from the early to mid production variants but the turret is the key and seems to have undergone the most changes. From the angular plates to the curved one piece. (Unless I'm just not seeing it and someone knows otherwise)

As always, any info is better than none so thanks in advance guys.

I have the tamiya kit of this and right now to build the variant I want it seems like I'm going to have to scratch a new turret. So I need some more info.

Mike