[Wendymott]

Hi peeps...... I did not consider the Varifocals as the problem, in fact they are a boon to me as a normal user. However the contrast thing did make me wonder
Terry... I keep the resist on the copper for drilling, as you say it enhances the contrast. And I keep it on afterwards as I found the copper did tarnish.... I dont hold with that anti tarnish spray. So it looks like the grain effect of the copper is to blame. I have a new pcb to drill... so... onward and upward.