Due to the gin bottle running dry, I made this with 50ml of gin and 25ml of dry vermouth and the result was an pleasantly surprising, lighter but still distinctly a Tuxedo No 2

I tried with the addition of 1 dash of black walnut bitters and thought it added to this recipe

Excellent, for me superior to the traditional Old Fashioned. The herbaceous flavours of the Benedictine work incredibly well with a strong bourbon like Jim Beam Black Label, really makes for a very refined and complex cocktail.

I agree, it's just too overpowering with the current mix