There are already several threads griping about update delays.
Please move your comments there. There's no value in adding another one to the forum.

You need to increase your extrusion multiplier so you're putting out more material. I run a test part with an extrusion multiplier starting at 0.85 and going up to 1.05 every 3mm in height by using 20 different processes. Then I peel the skins off until I find where I'm getting bonds I can't separat...

The gap is too small for infill. If you want a solid part, I have better luck with 9999 bottom layers rather than using 100% infill. On the advanced tab select "Allow Single Extrusion Fill" at internal wall type. Under single extrusions I have minimum printing width at 10% and maximum at 200%. That ...

I reduce speed - usually just for single extrusion fill - but could be layer based - with the post processing script function and M220. Your print speed for the part would be the maximum you want to run -then you can reduce to a percentage of that, for example 50% is M220 S50. If you wanted to set y...

I'm guessing your first layer prints slower. If you're getting good fill but faster layers seem to underextrude, I'd increase temperature. Different brands of PETG print differently, but I rarely go below 240 nozzle temp and print some as high as 260. You'll probably get better layer bond strength a...

add the gcode to your start script.

please post photos or screen shots to clarify the issue you're having. Is this happening in the slicer, or on the actual print? If in the slicer, include your factory file.

I am able to get accurate geometry typically within +/- 0.1mm on my parts using the methodology outlined in this thread using my Calibration Cross test print an the accompanying spreadsheet to calculate part scaling factors and horizontal offset. https://forum.simplify3d.com/viewtopic.php?f=9&t=6130...

Are you talking about an actual slicer feature, or the ability to enable it?
I simply have the gcode command in my start script.

Make sure you're barking up the right tree. Is the glass warped, or is the gantry sagging? On my old Makergear M2, the plate with the linear rail for the X axis would take on a little warp. Some said it was a reaction to the belt tension - I never confirmed the true cause. I removed the linear rail ...