What Im really wanting to do is create xp tables for experience gained as a result of defeating a specific encounter, not experience required to gain a level. If I say I want to have 20 encounters between levels or that I think average party size should be based on 6 instead of 4, and I know the CRs of particular monsters (because they are released as OGC) can one reverse engineer their own experience point tables without stepping on WotC's IP (primarily their tables on page 101 and in chapter 7 of my DMG)? Or is this reverse engineering and their prohibition about xp tables in the first place (for d20 logo licensing anyway) why they have specifically left it out of the SRD to this point?