Please help me focus Marquee 9500 LC

I have a marquee 9500lc ultra. Recently Set at 120" screen width.
MP mods. 6 pole magnets installed by Tim.
Original focus coils.
I went thru the mechanical setup process in the help menu.
right side of screen is not as much in focus as left side of particularly the left most 25% of the screen. Particularly blue focus is bad on right side. Picture looks fine though.. out of focus is evident only when I display convergence pattern.
I thought I centered and aligned the projector fairly perpendicular to the screen. I might not have been perfect on it but I did spend a lot of time getting the projector placement correct on the floor. I saw guy kuos general focus guidelines.
I am hoping that someone might provide detailed help.. hopefully even with a few phone conversations. I am in Milwaukee.
In the past, I had originally William Phelps to come in for the set up.. years ago. Recently, I had another guy set it up again but was not happy with him.
I moved the projector since then and now I decided to go at it myself. I realize.. I should really get one of the "gurus" to come and do it.. I am in two minds.. that I should just sell the projector and get a JVC RS20! How ever, my projector displays a great picture.. blacks are excellent! I spent a lot of money on it recently for fungus cleaning, MP mods etc.. I am reluctant to spend more money on it.. hence this newbie questions..

I am not really very sensitive to color calibration.. I am more sensitive to focus and geometry.. I think I got the geometry quite right.. That was easy..
I went into the service menu for zone focus but that did not help much.

I was told by an expert that Focus is optimized with electronic adjustments such as stig correction, zone focus, flare magnet adjustment on the tube neck, side/side and top/bottom lens adjustment and lens barrel adjustment.
I dont know what Stig correction, side/side and top/bottom adjustments are..
I think I have done the lens barrel adjustment correctly. The adjustment of turing two hex screws near tube face.. not sure what it adjusts but I was unable to really get that to make much of a difference..

I think I did follow the section called shemphlug.. i think it involves turning the spring loaded hex screws - is that correct? If I recall correctly, I was unable to get much of a visual improvement, as I was turning those spring loaded screws.

I think they are GT17 lenses. I have had the projector for 9 years.. I forgot.. It has around 5000 hours.

well.. i got the schemflug adjustment done.. now both sides are equally out of focus.
as i wrote earlier, my screen width is 120". In the past, I was used to 90" width and the entire cross bar pattern was sharp.
Is it because of the larger size, the cross bar pattern is not sharp anymore. Green is not too bad but still out of focus at the edges. Red is better. Blue is terribly out of focus (normal for blue?).
is there where the franken yokes and 1292 focus coils come in?
Fortunately, the picture seems fine!

I did check the lens focus and zone focus.
Since you too have 120" size screen, how is your blue checkered pattern? I can barely see the digits during zone focus.
I really dont want to fool around the high voltage area.. like the focus coils or yokes.. I dont know what stig correction is..