Homebrew PCBs

I used to use an hp 7475A plotter for pcbs and I found it difficult 
to get good results. It is very hard to plot double sided pcbs. Even 
if you get that to work, you still need special pens that are 
resistant to etchants. I decided to look on Ebay for an Okidata Laser 
Printer and print to Jet Print Photo Graphic Image Paper. I haven't 
looked back since. Genaro