That's the thing Diki, I'm a heavy harmoniser user and I've found the built-in TC well adequate for my needs and I'd like to avoid the extra hooking up of a standalone. Besides that, on one end of my 1X sits a small mixer and at the other end sits my Bose Tonematch. Also, I'm sort of bsnking on the 900 having a bunch of sliders a la the 3X (I like sliders, too).

As I say, after all this time there ain't no rush.