Just went down to check on this. Found that the L-AF flanges on their new cylindrical hoppers went through the frog smoothly. There was a slight up tick when riding over the actual frog, but the wheels never left the top of the rail. When running the Code 110 wheelsets, there is a slight drop between the closure rail and the frog at very low speeds. This, however, did not cause a problem for me.
Thanks for the update. So, with a bit of ingenious modification you have effectively got a universal turnout to suit all needs. Is it worth going to FVM with this and letting them know what you have done? It would then enable them just to make one model of turnout for all needs and they wouldn’t keep running out of the hi-rail version.