@JohnsNotHere :verified: Not wanting to interrupt, since it barely matters. But - why did you go with 1d6 and 1d20 vs 1d6 and 1d10?
Was it the Two Standard Deviation is ~5% thing?
Something more "exotic" with a 1D20 vs a 1D10. Plus it makes people feel as if they have a better chance. I.e. purely personal and unscientific. ;-)