"all that maths is fun" uh-huh. How someone designed this product and figured out where all the resistors, oscillators, crystals and flip-flop chips and other

"all that maths is fun" uh-huh. How someone designed this product and figured out where all the resistors, oscillators, crystals and flip-flop chips and other pointy out things go where and were while ensuring it's tuning to 15.something mhz is beyond me. Very cool though, I really envy knowledge of such.