Tooled them myself, tstarted tooling in the mid 70s
Yes I have done both also made prototypes as well.
But I repair more than build these days,
I have a cases or two on the table will post as soon as they are done
I have fixed alot of cases that others have thrown away. I have also converted cases from 2x4 to a 3x5 just by changing the inserts, along with the top and bottom covers
Terry