Working up for PP does take a substantial amount more of time than GG, to do it right anyway, LOTS of Variables, From the Bullet Diameter to the Type of Paper used. I have several different Papers, all reasonably close in thickness, But each one gives Totally different results, From Good to HORRIBLE. My favorite paper so far is Strathmore Series 300 Tracing paper, it has been the best all Around paper in my Testing. A good friend of mine here with an Old Hepburn would like to Try PP, and i have offered to help him, He told me “I don’t have time to try and Figure out PP, i have way to much going on, From Work to Life in General” Anyway, i’ve offered to help him, We are gonna start working with it this Spring. Grease Groove is EASY compared to Paper Patch. Both can be EQUALLY AWESOME when you have everything right, it’s just MUCH easier with GG