This object was made in Tinkercad. Edit it online https://www.tinkercad.com/things/101oI0pbach

Yes

No

.2

10

A brim will work . Print 4walls inside and out. Infill 10
It is scale up or down Just you might have to make the Bowl howl bigger with a drill.
The 4 walls keep the bowl in place firmly. I glue the metal Bowl once it is in
You can find a bowl at most smoke shop or ebay /temu etc. It has a kick so you gotta start with slow hits untell you get used to it.
The inside tapers in a bit for some compressing of the smoke kind of like a ram jet.