I've heard worse ideas 🤣
How does the template work? Presumably there's some sort of scale reduction because that looks a very big dish, more like one of those medieval spoon shaped instruments than a carved top.
Hang fire on giving Jeff Bozo more money and see what's in the locality on ebay. You may be able to pick up an old pillar drill which if you get it right will be more substantial and better quality than a new bbot ones online.
OSB flooring returns 😉, have you tried to make a bass out of it yet?
Make it a weird shape, like an explorer, or a faceted version of something curvy?
What's a butterknife style machine head?
I mean, if you recessed the screw heads properly and wanted it to look properly left field rat-rod style you could always put the screws in from the front. There's enough clearance between the frets at the dusty end of a bass neck...
As long as it's secure it's just a visual thing at the end of the day...