[Ogf-l] Attribute Changes?

[Jonathan Young]

Hi all,   I have a question to pose...   If I changed the attributes by replacing them with three simplified ones (ie. Might, Reflex, Savvy) would this still be considered "legal"?   From what I understand this would not be "d20" anymore, I like the system but I am trying to compact the Characters down to something the size of a trading card.   Making this a travel size game but still compatible is giving me fits....   any suggestions?   Thanks Jonathan