The Clickspring skeleton clock comes to mind, but for model engine builds we’d have to point to [Keith]’s earlier 1/4-scale V8 engine. And we’ll hasten to add that as much time as [Keith ...

but anyone can buy a 1:25 scale plastic model car, a 1:18 scale diecast replica, or a cool (and functional) small-scale engine. Motor1.com recently wrote a quarter-scale V8 that sounds absolutely ...