We had the same situation going on with the MCU in Heavy Unit. The doc's images were good, but not amazing. We typed them in, but asked for higher magnification images, knowing there may be some issues. Just the other day, the Doc sent us those higher resolution images. Phil typed in the images (I didn't finish my typing), fixed a couple of bits we had improperly typed with the lower-resolution images, and hooked up the MCU.
The results should show up in the next release of MAME. ----
The word "blurst" accidentally got typed in instead.
"It was the best of times, It was the blurst of times."
In the meantime while waiting for bug to be fixed, try X-Plan instead.