Looking very good. tough I would consider a dusting cover over the wheels as in the feild they are never straigth black they uselly have a grayish color due to wear and dust.
one thing I noticed after a quick glance at my References..
The M3 had the .50 cal pintle mount.. which was found unsatisfatory and was changed to the M49 ring Mount in the M3A1.. in addition a large number of M3's were upgraded to M3A1's because of this.
Also the Storage racks on the Back of the Tamiya kit were developed for the M3A2 which never saw production because by the time it was ready for production there was no need for them.
when I built this Kit I did it straigt out of the box.. it was my first military vehicle and someday I will do it again just because I liked it so much...