After watching a couple of my shooting buddies double (unintentionally) my .470 double rifle, I trained myself to shoot the rear trigger first on that rifle and it worked famously, even though I have a safe full of side by side shotguns that I shoot front to rear. To me it’s no different than training to shoot a Glock vs 1911 vs Browning Hi Power vs a double action revolver ect… You can easily learn to shoot any given firearm with zero loss of speed or accuracy as long as you train to do it. All this to say rear trigger to front is completely doable, and it comes as close to completely eliminating any and all chance of a double as there is. Just my 2 cents.