Here is the hole done and the 4 holes done!
A far as procedure: After marking placement
Trace the outline of the 4"pvc on to the glass.
Roll the plumbers putty into a snake (like play-doh) and try and place it on the trace line.
Place the PVC gently on top of the PP and make sure the PP is underneath. Then firmly press down and gush it!
Form the PP around the inside and out to make sure it will hold water.
Fill half way with water. You will still be able to see the sharpie through the water.
Line up the bit with the two square lines made in placement. Start the drill very slow and on a slight angle to get a groove going. When you feel comfortable that you have the bit where you want it and started on line you can increase the speed of the drill and slowly start to move to level.
Once you have a complete circle with the bit you can put the spurs to the drill. No force should be put down on the drill. The weight of the drill is more than enough. Make any movement very slowly b/c you don't want to jam the bit up and crack the glass.
Keep an eye on depth! Slow down when you think you're close to the end. Finish slow and make sure you have cut a complete circle or what remains will chip out and thats no good!
Peel the tape with a container underneath and drain the water. Pull up the pvc, reuse the PP, wipe down and your done!
