Another update for those that might be trying to figure out this stuff in the future.
To setup duplicate mode offsets set the X axis offset to 0 and the U axis offset by the total length of your axis (distance between X stop and U stop).
I cannot figure out a sound method for setting up the mirror mode offsets as I had to just trial and error my way through it (stupid me thinking they'd be the same as the duplicate mode). I found a ratio between the X and -U offsets that add up to the length of my axis and put the tool at X0 U0 through trial and error. My axis is 397.5 and at offsets X150 and U-247.5 the tool position would read 0, but the print heads would still move a little and crash. I then found the offset X165 and U-247.5 that would make it so the tool heads would not move when the tool was changed but the tool position would read 7.5. I learned this tool position could then be offset by any amount without causing crashing issues as long as the same value was subtracted of the X offset and added to the U axis. To find the value I needed to offset this by I took the home position of my T0 (-182.9) and subtracted 7.5 from it getting 190.4. I then subtracted this from my X (165-190.4=-25.4) and added it to my U (-247.5+190.4=-57.1).
I don't understand why this is like this and why this stuff isn't well understood/documented. Are others having the same issues on their IDEX setups or is this my machine specific?
