Make your own!
The last engine purchased only had the top half of the box (first for me).
I decided to make the bottom half.
Initially, I was going to use cardboard but thought the foam board would be better.
After measuring the inside of the top of the box, I subtracted an 1/8" to allow for minor errors; also, top of box will never fit over too large of a bottom box.
Perimeter cut out.
Only need to cut, barely, into the top of one side of the outer surface of the foam core. Kind of like cutting sheet rock, score and break, only the bottom of the foam core remains intact.
Some box tape to hold the sides. Some 'foam safe' CA would also work.
Since the foam core is 1/8" thick, the ends were made an 1/8" wide on each side.
A paper cutter was used to trim the foam inserts since the 1/8" thick foam core is thicker than a normal cardboard box.
Good fit.
