Question Gantry issues

[Laserbea4k43]

So it seems that when my gantry reaches a certain point on the y axis, its path curves a bit.
I've come to this conclusion while having problems printing PLA and switching to ABS.
It's 10x more pronounced with PLA but you can still see traces of the problem in ABS prints.
When I do the rack test, my tool head doesn't move, should i still loosen all of the joints on my gantry in an attempt to realign anyway, or is there another problem?

 

[NoGuru]

Yeah, sometimes you have to rack it several times until it turns out just right.

 

[Laserbea4k43]

I'll give it a shot before my next print.

 

[Laserbea4k43]

I probably shouldn't have tested with a 17 hour print
did a lazy de-rack and the problem isn't so bad. I'll do a full de-rack tomorrow....