VOR tracking for the vertically challenged

What! Turn off the GPS????And fly like it should be done???I might as well chop off a leg.......Sometime, when I have a free year, I'll get my head around this stuff, coz GPS takes all the fun out of it, but.....it's only a wee click away. Bit like people reliant on soft toys for comfort.Anyway, whilst we're on this subject, has anyone noticed how the altimeter reading on the 777 always seems to be one millibar below the advised altitude reading?In usual flight, the reading is generally 2992, however on the 777 it defaults to 2991, and repeated hitting of the 'B' key doesn't change it. I need to always increase it by one by twiddling the knob on the altimeter dial.All other a/c seem fine.Is there a point I'm missing here?ThanksAllblack