There's no way this cocktail can possibly fit in any standard size coupe glass - assuming these are the correct ratios. It's a total of 5 1/3 oz volume BEFORE dilution, and then you have to factor in your egg white foam as well. I used an over-sized (11 oz) cocktail glass and it was basically full to the brim.
Agreed. Not a cocktail I've yet made (one of a number of Legacy cocktails I need to tackle), hence the lack of review and Difford's rating, but I'll reformulate, add a review, rating and our own photo ASAP. Thanks for bringing to my attention, Landon.