Bit of a curates egg this one, I've found this with most stuff in an italeri box to be honest in that on the sprue things look great then when you start putting things together it all goes to pot. Italeri have the drive and idler sections of the hull separate and to be honest if the engineering was good it wouldn't be a problem but 4 pieces in and I know I have a filler queen on my hands. This one is a case of dry fit, swear, shave, sand, dry fit and finally swear. You get it close but not close enough. Vallejo putty will be my friend on this one. This brings me to the fit of the hull I had to shave various pieces to get to what you see below
Which brings me to the zimmeritt wtf????? I may have a play with that as it's well, weird?