I have this incredible attraction to Formula 1 engines; they rev up to 12,000 rpm like swiss watches, so smooth...
F1 Engines rev up to 18,000 rpm
A couple years ago, they were limited to 19,000 rpm, but now they are required to rev no more and 18K and must last two races.
I have Burgess bottom metal on my Echols Legend.
I have Williams bottom metal on 2 of the rifles that Mark Penrod built.
I have factory 3 piece metal on a couple of bone stock M70s.
There is a huge difference in quality. You do indeed get what you pay for.