Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Dave Mucha" <dave_mucha@y...>
wrote:
> 
> > 
> > I am using .064 FR4 1oz as well. I use PNP Blue for the transfer.
I
> > use 30gauge wire with a .015 bit for most through holes and have
had
> > no problems with getting a good enough alignment. When I align I 
> use a
> > small light table and a microscope.
> 
> How do you align ?
> 
> Drill before or after ?
> 
> I just thought that if one were to drill first, you can put the 
> dholes exactly in line with the board and then use the holes as 
> guides for the transfer.
> 
> Downside is etching the holes.
> 
> Dave

For me, it is easier to etch and then drill.
After printing onto the TT, I will align then tack the two sides
together with scotch tape. I leave a little extra of a tail  on the
side that I will apply the tape to. I also apply tape  to the sides
,along the tail, to minimize any twisting.