Not a bad idea, but of course, means getting an extra plate for each long lens - so as I have 3 long lenses, may not bother. Will see how much they are before I decide.
Thanks for the advice
Had to search for your gear list (link in your sig. points to JK's), but your 70-200 2.8 uses the same tripod mounting ring as the 100-400 and 300 f/4 for starters. Unless you spend a lot of time swapping among your various long lenses (which, when I found it, your gear list didn't reflect; only showed the 70-200) then you don't necessarily need one mount per lens.