I made up the mounting blocks to sit the Roto in place. There's still some reinforcing to do around this but just getting it to sit in place for now..
and also gluing in reinforcing plates to the back of the firewall to make sure the load is well spaced
I've drilled pilot holes for the mounting bolts but need to do some more work on them to align correctly and also glue in captive nuts. Fingers crossed I will get a look at that tonight!