The video is good for the purpose that it is used for. To drill straight round holes in sheet metal or wood at a 90 degree angle. Notice how much pressure it took to puncture the sheet metal and the washer that was formed on the end of the bit that would stop the drill from traveling any depth in metal. The wood clears the chips out , so there is no problem there. But you are not going to be able to drill the sheet metal at a 15 or 20 degree angle and produce the oval hole you need in segmenting!! The pilot point on the sheet metal drill will tend to slide down the angled metal in your blank causing heat to soften the glue or lateral pressure that will break your blanks. As John T says, there is no magic drill for mixed materials !! However there are solutions I have used to solve this problem. First, but not 100 % full proof, is to soak the outside of your blank with thin CA, hit it with accelerator, and wrap it tightly in duct tape or some other nylon reinforced packing tape. This may not keep it from coming loose, but it will keep all the pieces together and inline so you can glue it back together, most of the time. Resoak the inside after drilling and rerun the drill bit back through before untapeing. The second method I use is to drill my blanks before I assemble them. How do I do this ?? Drill the wooden or poly blanks before cutting into segments. I have made several jigs out of 1 inch square metal (whatever you have on hand) and short enough to fit the stroke of the drill press. Drill the size holes you will need to fit your pen tubes at least 3/4 of the way into the metal jig, or all the way if you want. Next cut 4 one inch by the length of your jig wood or metal strips about 1/4 inch thick. Stick these to the four sides of the jig with two sided tape. Drill 2 holes in each about 1" from the ends all the way through the slat and the 1" square metal. Tap the metal out for small machine screws. Take your slats and enlarge the holes on one end so you can slide the jig apart and have enough room to fit the thickness of the you intend to insert into your blank. Now cut the metal jig in half at the angle you want to insert the metal pieces at. When you go to drill your pieces you will only have to remove one side of the jig and loosen the screws where you have elongated the holes on the other three. I cut my metal pieces 1 inch by whatever the inside measurement of the jig is after you cut your angles. put the remaining side back on and tighten all your screws. Drill your perfectly angled holes in the pieces. I do my glue ups on the tubes I am going to use and coat the blanks again with Thin CA to fill any voids. If you don't use a metal lathe, or even if you do, take your blanks to the band saw, disk, or belt sander and round off the corners for smoother turning. Jim S
