Originally Posted by More Champagne Sir?
.... It's somewhat unfortunate that after I've chosen the main places (i.e. where I'm taking a stopover), I only have maximum 23h 59m in each other city, but so be it. Of all the cities I'm overnighting in, I am actually pretty keen to visit and hopefully I'll be able to get enough out of Las Vegas and Toronto in a measly 24 hours.
You do realize that it is your choice whether or not to stopover and on the OWE fares stopovers are free (with the only limitation of 2 stopovers in the continent of origin). The other impact of stopovers is the tax calculation, but other than LHR it is a very small amount. For LAS it is zero (extra cost for stopover vs. transit), making your comment about "so be it" a bit ironic (it is limited only by your choice, and nothing is preventing a stopover). For YYZ there might be a difference in charge (not sure), but it would be less than USD 10. Hopefully you'll plan your trip to stopover where you want to, and not by some artificial constraint.