Good work so far! Your springs are great but I'm afraid you have to hide them, sorry. On the real guns they were covered with canvas sleeves, for safety reasons, I guess. This is well visible on some pictures:
Also, another detail was spotted but when it was too late for my gun to add it (as always!
). There was a third small step on the right side (considering the barrel is front) and Revell completely missed it. This step was interconnected with the running board to fold/unfold together with it:
Just to play safe, have the links to the two walkarounds of the gun at Ft. Sill, although I'm almost positive you know both places:
Keep the good work up! I'm eager to see your big gun painted. It is always pleasure to see we, the gun bunnies, are many here!