MOPE... Singh isnt a member on any site I know of...lol. You talk to the few who use his ideas. They are called Singh grooves for a reason.. a radius is a rounded edge. The groove is a directional surface feature, and the technology is 80s vintage. Nothing new. You're doing what a lot of guys here and elsehere do. What did your friend tell you do do about the piston and your choice in machinist?
back on topic... I am 100% with Needsaresto. K.I.S.S. You will get much mroe power from great machining and stock parts, than big dollar parts and skimping to have the money for them. Cool Dad/daughter build too. I like teh XE268 cam, or the larger Summit brand (Crane...)