Hey Denny,
I'ma thinkin' "this" will be the mold :thumbsup:
Just gotta "stiffen 'er up"
...so, I can "take 'er off" the chassis
So, I used spray foam (ta help 'er hold its shape)
...& "lock" everything together
...& "firm" the whole unit up a bit ;)
&/also,
I installed a tube
...& inflated...