I had to find the pictures....
This is the boom mount as designed ....Well most of it.... it started to lift on the printer so I stopped the print that's why the boom mounting holes aren't done....I'll show you on the reprint...
I sits right in the original location and the cab goes right back on it....
I remixed it a little and cut out the part in blue.so I had the space underneath it and I clipped a little out of that inside corner to clear the new slew motor so it nests right in tight to the mount.