PCB is not flat

I would hold of on the bolt that seems a bit hard core.

First of all I assume you are printing either firectly on the PCB or on tape on the PCB if so things will continue to be difficult as things change as they heat up and cool down and anything permanent like epoxy will cause failures someplace most likely.

The solution most of us are using has to do with a piece of glass placed on the PCB some people say it needs to be boroglass as it is heat resistant and that regular glass will shatter. That being siad I did not have boro glass available to me so I did go with normal window glass I got two 10x10 pieces for about $10 at my local hardware store and thay have served me well in all honesty one did break about three days ago but I am not sure why I think I did something actually

Now the glass does two thing it protects the PCB form direct damage and it also gives you a FLAT printbed the process I use is as follows I do not count on the two side tape holeit down I choose to believe it is to prevent it from slipping around anyway. On my PCB bed I have little holes that line up with the holes on the wooden bed

Step 1 Tie wrap through the holes to hold down the corners
Step 2 tape the edges of the pcb heatbed down to the wood wrapping the tape from on top of the heat nbed over the side and to the underside of the heat bed
Step 3 place glass down on heat bed do the same for it tape down the edges over the pcb and the sides to the under side of the wood
I use the blue painters tape and this seems to hold very well
when the glass get dirty it is easy to remove clean and put back.

The most important step in gettin prints to turn out well is not just a flat bed but a level bed so after it is secured down heat up the bed and use a dialindicator to adjust the heights of the print bed at the corners then you are ready to print

if you do not have bed leveling capabilities here is a link to some that seem to work well for me and I am using them right now

I designed this and I thought I put this on the forum as well but here is the thingverse item
http://www.thingiverse.com/thing:125626

good luck and welcome to all the aspects of printing

 

It is called a thermister and they are relatively inexpensive on Ebay

 

no problem here is a pic of my tape down on my pcb with window glass