[oztankboy]

Here are a few more photos showing a few more details and differences:-

Photo no. 6: shows an alternate mount for the "A" set ariel on the front of the right hand sponson. I have seen this style on M3A1 Stuarts and located the ariel close to the where the 19 sets ATU was located. However it also also put the ariel in harms way of the 37mm barrel when the turret was traversed to the right hand side.

Photo no. 7: shows the original position of the "B" set ariel mount prior to being relocated.

Photo no. 8: shows the "A" set mount (in blue) and a different orientation of "B" set ariel mount (in red).

Photo no. 9: shows the "A" set mount and some of the tabs for the condute for the ariel feeder. Of interest is you can see more clearly how the mount has been made from the original US ariel mount.