OK, so
PING website says for a 6'1" fella with a 37" WTF they want you +1/2" and 3 up.
PING rep says lets take a 1/4" or the full 1/2" away but move you upright another degree.
So you buy 4 up and 1" over to cut 3/4" off to have 4" and 1/4" over.
Logically, it makes perfect sense.
What I've previously mentioned will still happen, though. Now, they could play like your recommended fitting, but also could play only 2.5° up. This will totally depend on whether or not
PING builds the length after the lie is set, or whether they bend after length is set (which I'm pretty sure is how it works - build to length, then bend for lie). So in your fitted set, they would have built it 1/4" over, then bent them 4° up (which, by the way sounds ridiculous for a guy my height with my WTF. You must stand very tall at address). Don't be surprised if you have to have them bent upright again to hit Silver spec.
Bill, it's nothing to be afraid of. You gotta start somewhere.
Clubmaking is another one of those venues where a little knowledge is a dangerous thing. When you first get in, it's very much about little jobs like regripping and altering your own lengths and shaft flexes. Then you learn about all the little tweaks and quirks that you can do to ensure a better quality build - like frequency matching, spining and floing, shaft profiling, swingweight or MOI matching, and advanced concepts like True Length Technology (TLT).
But like I like to say, anybody can cut and glue
clubs and stick 'em together. 200,000 underage chinese assemblers can't be wrong.