The typical Las Vegas single-deck game does not allow doubling after a split and the dealer hits a soft 17. I have already enhanced the house edge table in the blackjack section to include a wider variation in rules.
However, in real life, when single deck is offered the other rules invariably become more stingy. At the time you wrote this I indicated the house edge according to a fixed set of rules that varied only by the number of decks.
