Large prints with nGen

I’m trying to do a much larger print than I normally do and I’m getting some curling in one of the corners. I’ve really only have had this happen to me once using nGen it seems to typically adhere to the PEI build plate much better than ABS or PLA.

The size of the print is 10 inches by 10 inches and only about a half an inch tall.

I’m about to try increasing the ambient temperature and using a clean build plate without using a glue stick.

For larger prints is there a trick regarding filament and build plate temperature? Curling typically happens due to the material cooling inconsistently and just not adhereing properly to the build plate, right?

Would decreasing or increasing the number of shells have an impact on a larger print like this?