ok.... I guess my English is not good enough...
people are not understanding what I say...

let me try again.... in Chinese....
errr..... ok.. maybe not....
let me try again with pics..... (ahhh.. better... right ??...)

what I want to say is....
the cab is big or small shouldn't be a pblm....
if the cab ends up 7 ft or 6 ft 9..... should still be ok...
(if its too tall for kids, then provide high stools...)
but what is impotrant is the angle of the monitor is mounted...
if you look at the left one.... the angle is mounted so that the monitor is facing up... (exaggerated...) then... the guy has to be TALLER to see the monitor straight......
if you mount the monitor vertical.... (right side pic...) then the guy doesn't need to be sitting as tall.....
depends on who is playing your cab....
you need to make sure the guy's hands can comfortably resting on the CP.... and his head is comfortably standing / sitting on stool.... (no need to stretch.....)
or else, it'll be pain to play for a long time.....
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I said this because you said in your original post that the monitor is too big to follow the exact 1up's plan.... and the monitor has to be a few inches higher....
if the monitor is mounted higher, it "might" be compensated by mounting a little more close to vertical... then you don't need to stand as tall to see....
or another way is to mount the who rotating panel out a couple of inches... then you have enough space in the cab to mount the monitor the same level... since the monitor is bigger... standing a couple inches behind shouldn't affect gameplay....
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ok... this time better now ??....
just want to make sure...
do you guys see the pic ??....
(i might be smart enough to make a cab from scratch...
hmm... if you call that smart.... but I might not be able to attach a pic..... lol....

)