Homebrew PCBs

I read with much interest all the work that is going into the TT
method of creating artwork on copper. Has anyone experimented with
modifications to a Laser Printer to directly apply the artwork to the
copper? Seems this would solve a lot of the issues, if it were
possible. I remember a few years back I had a Laserjet 4L. It had a
straight through path and would accept some pretty thick card stock as
I recall. Now I wish I had not thrown it out in the late last century...