Rolling for backgrounds when using custom races (by Ibidems)

This rule/guideline was made because, when using custom races and still wanting to roll from background, I got the problem of some combinations of choosable and benefit combinations meant you could get the possibility (albeit low) to roll a background where you already have both options from your race. Rather than a reroll (that I thought boring) I instead settled for this rule/guideline:

If you gain a background but already got both options from your race you may either:
 * Pick one benefit from your race benefit table other than the ones you have already gained (no doubles)
 * “Improve” your social class and take a fitting alternative (at GMs discretion), like a Tradeperson (Lower) instead becomes a Merchant (Middle) or a Student (Middle) becomes an Apprentice (Upper).