I found the problem. Stupid user error... I've been battling with this past 3 months.....
M671 X:-150:-150:800:800 Y-10:850:850:-10 S1
I have a : in front of the x axis coordinate X:-150
Ugh...
But Thank you very much guys administrator and Phaedrux wouldn't have been able to figure this one out without you guys.
finished print - t-rex skull by MakerBot
M566 X1250 Y1250 Z78 E310 ; Set maximum instantaneous speed changes (mm/min)
M203 X15000 Y15000 Z160 E9000 ; Set maximum speeds (mm/min)
M201 X210 Y210 Z100 E2755
200 jerk and 1050 accel got rid of the bulging corners for me
ok I played with my jerk and acceleration settings more and got not much of a visible difference, if anything. I downloaded and Installed the new firmware and am noticing a lot less difference at higher speeds than slower now just to fine tune it. Any advice ??
haha, not much building the machine and testing, and calibrating it for resale purpose. Ive had a few request here in Toronto locally and have build a few small machines, But this has been a crazy 8 month battle from design to build. But looking good now... finally.... Larger machines are soo much harder to calibrate than smaller ones I've learnt, but think I've got the hang of it, besides this ringing...
NO in regards to the notes I will look at them, right now... and report bak, you guys are quick with the responses I really appreciate it....
On another note, I"ve started printing a low poly waitier hands. ANd am seeing a lot of ringing and cannot eliminate it no matter what I try. I did notice it on my t-rex from MakerBot which scaled and printed beautifully, but because there were many small curvatures the to form the skull ur not able to see them as clearly. But they are there, visibly. some pics of the ringing with the low poly waiter hands. any advice, I've played around with jerk and accelrations and speeds from 50mm/s-200mm/s. and cannot get rid of the ringing.
adjusting
a finished print, in case any one wanted to see it.
yes I do have the height map with g29 thanks again guys
ALSO one other thing now when I run g32 I get the leadscrew adjustment made 
but I am not able to see a heigh map from the gui.??