Homebrew PCBs

I’m a relative noob trying to prototype a computer keyboard project where my
PCBs are about 12”x6”. They are single sided and have only 14 surface mount components but
these are really small. I would appreciate any advice from you guys with
experience with big boards and small components.
 
I have two substrates I am working with; .008" FR4 and
Pyralux. I am trying to do toner transfer using Office Depot “glossy text”
paper, but that paper shrinks about 1% when heated, so the toner is not
sticking properly in some spots and the Pyralux is actually wrinkling in the
laminator due to paper shrink.
 
More details about my project here:
https://geekhack.org/index.php?topic=40111

Thanks


[Non-text portions of this message have been removed]