He recommend 50% infill so that's what I went with, there was a comment that if infill was less there was chance of suction causing it to break. Cutting infill back didn't cut the print time by that much. The printer I have a lot of people complain is a slow printer, but it has a huge print bed (like 15" x 15") which was higher priority for me than speed.
The protrusion is the support needed when printing, needed to support the arches and areas that don't connect to the bed directly, once done I just have to break off the support areas (which is a complete PITA to be honest) It has support inside the area that the hose connects to also.
Software says it used 273 grams of filament. I bought orange to match all my rigid tools