Perhaps
Dave should just clarify what he has now gone onto discussing as 'off topic'.
My read of it is currently more along the lines off 'Off Topic Projects and Interests'

and not 'Off Topic anything goes' if you have a read through.
Mech Eng has plenty of crossover to make it relevant as does 3D printing.
I wasn't a supporter of adding cooking to the forum much as I contribute there as it is a strong interest of mine.
But do we need a Gardening, Bike, R/C, Car, Travel, Woodworking, Skateboarding, Surfing, Fishing,
CAT...... threads or sections on an Electronics forum?