Phil O
Western Thunderer
If you can when using copperclad, I would recommend that you gap and test before you use them, it's easier to make sure that they are electrically isolated without the rail in place. I put the "timbering" on the template and mark where I want the gaps with a feltip pen. It's also easier to control the cut through the copper. It does get a bit hairy when constructing diamonds and slips, making sure that you don't remove to much copper where you need to solder rail.