Some quick ideas/other ways to do it:
I gave up on tiled plans after I found out that Kinkos will print plans on their large format black & white printer for $7 or $8. I figure my time is worth the money. Tiles can be a PITA and this is supposed to be fun right? Jus take a PDF in on a USB stick and ask them to print it on the large format black & white printer at 1:1 scale. The printer can print up to 36" wide and any length, its fed from a roll of paper.
I use 3M "
Spray Mount Artists Adhesive" to tack the plans down to the Depron. You can get it at Hobby Lobby in the drafting section. Don't try 3M77 it will stick the plans down permanently.
I stopped rough cutting the parts out of the plans because this makes them more prone to bending when they are being laid on the Deporn. I use big pieces of paper the size of the Depron sheet and just stick the whole thing down. I use the CAD program to lay out the parts so I don't waste too much of the sheet. Matchless is right, you want to check it with a straight edge.
Keep 'em coming Matchless!