Welcome to the Aircraft forum GI_Babycakes, (love the name, can I call you GI

) I don't think we need any specialists to tell us what a great job you have done. I have searched for something that could, maybe, be improved and really the only thing I can suggest is that the main rotor is drooped (the experts might be able to say that the rotor on a Bell 47? didn't droop so the only other little thing is the pilots head could be a little annimated by turning it to look left, or right (this is assuming that one of the figures you are waiting for will be either a patient being loaded or unloaded or medics approaching or some such thing). These are very minor points.
The bubble is very well done, very clear with no flaws, very good. The clear covers on the stretchers are also very well done. I don't know much about Dioramas but you groundwork is equaly good. Can't see much of the pilot but what I can see he looks to be well painted.
GI, it would be great if you would consider entering this in our MOM (Model of the Month) you should have a very good chance of taking the honours with this (it will mean I will have to re-consider my entry, but it will be worth it)
Thanks for sharing, do you have any more?
Mal