Chiming in late as usual on the proportions issue:
Not to me I'm afraid. Something funny about some proportions,
That's what I thought when I first saw pics of it - cockpit seems too far forwards (which makes the nose look stubby) and the back end looks fat - but, looking at the ILM pictures, it seems like red 5 is a bit of a mutant with a fat rear end and the cockpit seems like its a few mm further forward of the R2 socket. I suspect it was to accommodate the mechanism for the wings.
There's a top view of red 1 and red 5 in that set of ILM pics and you can see there is a difference in proportions between the 2 ships.
I suspect we're all too used to looking at red 3 and the pyros.