1)Peter has a YoutTube video which I interpret to mean, one can drill a 20mm approximately 1” deep hole with the stock bit that comes with the Parf Guide System. The resulting 1” deep hole may then be used, as a guide, to “carefully” drill deeper holes in thicker workbenches. I have plans to make a 3” thick workbench top from German Beech. I am wondering if the described system is a reasonable approach to drilling 20mm dog holes in that thick a hardwood bench?
2)Lee Valley sells a 20mm bit that is 6” long, "with 3 5/8” of fluting”. The bit is designed to be used with a 20mm Dog Hole Bushing LV sells. This is about the only 20mm bit I am finding on line that I believe will drill a 3” deep, 20mm dog hole. According to the LV description the bit will only drill through 2” thick tops in conjunction with the bushing, which is typically installed in 1.5x ? lumber. I guess if I use it in the 1” deep 20mm hole made by the Parf bit, without the Bushing Guide, it might work? I know it want work in the Parf bushing. My favorite large bits turn out to be metric although they are marked in inches, made by Wood Owl (Ultra Smooth Tri Cuts). However, Wood Owl apparently makes 19 and 21mm bits, 7.5” long but not a 20mm. I am wondering if the LV bit, or some other bit I have yet to discover, will drill through the additional space below the 1” 20mm hole the Parf system makes?
3)Peter uses Medite Smartply, a moisture resistant MDF, to make his table tops. I have a height adjustable table/workbench I am working on that I may use a similar material on. My search for Medite Smartply seems to suggest that this product is only offered in European countries. I was impressed with the fact that drilling this material in Peter’s videos was producing actual shavings vs dust that got airborne. I am wondering if there is a similar product people use here in the US use to achieve similar results?
4)I already own Veritas: Surface Clamp, Hold Down, Bench Anchors, Planing Stops, Bench Dogs, Wonder Dog. I also own a Festool table, Festool saws, Festool clamps...Will the LV items work in the slightly larger 20mm holes or do I need to drill holes for both size dogs?