Zb is a bit finicky I loose a lot of details sometimes as well with go Z. I've just gotten into the habit of making my base meshes really clean before I add any real detail, seems to be easier for Gz to handel. The other thing i've started doing is making duplicats so i can tweak one in Maya and bring it back into ZB and use the second one to re project any details I lost.
With this project ive been building pretty much just planes using the retopo tool in ZB and importing them into Maya for most of the extruding as i dont like the crease option in ZB atm as it really finicky for me and Maya right now can do that faster for me anyway.
Got most of the back blocked out today.
I am enough of an artist to draw freely upon my imagination, knowledge is limited, imagination encircles the world. (Albert Einstein)