exact composition calculator for 3 hands single deck

Switch Studio has released a 3 hands version of Microgaming's Classic Blackjack. It is available, for example, in the Betway casino. The well-known single-hand version has 99.87+0.04% RTP. Does anyone know how this affects the basic strategy and, especially, composition-based exceptions? This question was asked some years ago by David from London, who was lucky to find it played in some casino. Wizard answered on "Ask the Wizard #174" by referring him to a website that no longer exists.
PS: It's hard not to see that while Vegas Single Deck Blackjack can be played with up to 5 hands, Classic Blackjack only with 3.

Do you mean the microgaming version as, the one I found, they hit soft 17 and have other restrictions giving the game (according to https://wizardofodds.com/games/blackjack/calculator/ ) as a "optimal results" House Edge of 0.31%. That page says using basic strategy would be 0.46% so I guess seeing eleven cards (as it shows five hands) could bring an advantage in some cases.

Yes, both versions are interesting and worthy of closer analysis. The question is where in the internet is the blackjack calculator for multiple hands dealt from a single deck. Wizard's answer a long time ago was: "The blackjack calculator at gamblingtools.net (www.gamblingtools.net/bj/ppbj.html) is perfect for this kind of game. Now you just have to get the casino to let you use your computer at the table". The second problem is now resolved, by the way. We only need this calculator!

Quote: MattUK

Yes, both versions are interesting and worthy of closer analysis. The question is where in the internet is the blackjack calculator for multiple hands dealt from a single deck. Wizard's answer a long time ago was: "The blackjack calculator at gamblingtools.net (www.gamblingtools.net/bj/ppbj.html) is perfect for this kind of game. Now you just have to get the casino to let you use your computer at the table". The second problem is now resolved, by the way. We only need this calculator!

Gamblingtools was a great website. I believe the site creator posts here occasionally.

That the website is gone is not the end of the world. If it was available for free years ago it should be now somewhere. You can't rise the stake, but I suspect that the deviations from the composition-based exceptions alone may make it at least equal with the casino.
Of note, that multi-hands are dealt from a single deck in the Hacienda and the Peppermill casinos.