A Round Tuit™ finished this trivial project:
Yeah, it’s just seven pairs of holes drilled with a 5/8 inch Forstner bit in a scrap 2×4, which was then introduced to Mr Belt Sander to peel off the dust of ages.
There’s a spare set of holes in front because I’m absolutely certain that, without them, another pair of pliers would suddenly pop into existence on the bench.
The Smell of Molten Projects in the Morning 
Congratulations for owning a 3D-printer but still doing the sensible thing :)
One moment of considering retina-burn orange, then common sense broke out.
Whew!