OK, I've reached that stage at last. The 'Level Bed' option doesn't appear until I've done an 'Auto Home', which may or may not be how it's supposed to work. If it is, the build manual should say so. I'm also getting some weirdness with the LCD display: when I scroll down, the top line is half-gibberish until I turn the knob counter-clockwise, and in the Main Menu the 3 axis indicators sometimes switch between 'X' 'Y' and 'Z' and '?'. Back and forth every second or two. Is this normal? Nothing to stop the show yet, though enough to worry me a little. What has me stumped is that 'Level Bed' doesn't behave as it should. The head zips over to the front right corner, then clockwise to the other three corners, and ends up at the back right showing X=290 Y=185 Z=7.9. And that's it. Twisting the dial does nothing, and hitting 'Level Bed' again only starts the same routine. This is a Dual V1.1 with Titan extruders, running RC4 (until I get it working properly) and I am trying to do the mesh levelling bit. So I'm wondering if I missed a step somewhere, if the firmware didn't get flashed properly, or...or... Any help would be greatly appreciated.