Just lean back and relax.
I made an Eagle design with a PCB size of 410X320mm, populated with 130 ICs and lots of passive components error free.
The images printed out of Eagle are 100% to scale and can be printed on any carrier material like paper or transparencies.
If Eagle has bugs they can be found between the ears of the user.
Those bugs are created easily by changing grid sizes at odd numbers, e.g. changing from grid size 0.05" to 0.024" (instead of 0.025") you'll have a self made bug with nets that never join.
Boncuk