No way. I do not like the soft gooey purge cover and the need for tools to take the diaphragm out. Nope, solid G250/G260 for me all the way. The Mark 11 is not much heavier than the titanium Atomic first stage. True, every ounce counts but I have to draw the line somewhere.
The only tool you need to get the diaphragm out of a TFX is pretty much any skinny "stick". The shaft of a screwdriver, a long hex wrench. I used an O-ring pick the last time I took the cover off mine so I could check the diaphragm.