I have used one of these. Pleased with the results. No screws visible on outside surfaces.saw this nice idea . not in love with the pocket hole joint strength-wise ,but this is good
I also have a biscuit jointer that makes really beefy joints, especially in thicker wood; but it can give a slight 'kick' and leave the 2nd piece of wood very slightly proud of the 1st piece. Sandpaper is a wonderful thing ...I did use one a few times on the self build, okay for building frames but I preferred lap joints (and dancing) much stronger with epoxy glue, but mainly I could use plastic moulded corners with screws and Sika really solid joints.
16mm Radius Corner Mould Plastic - Magnum Motorhomes
16mm Radius corner mould available in various colours For use in the construction of furniture with 15mm furniture boarding Designed to take 2 pieces of 15mm furniture board at 90° to give you a perfect radius corner Simply slot in the furniture board and fix through the back leg Will work...magnummotorhomes.co.uk
Why don't we have the Robertson Screws in general use? Blame Ford and his meaness to not pay for the rights to Robertson in Canada.Posh git, I couldn't afford the Kreg one I got the Trend one, if they were not so bloody expensive I would have bought Robinson screws for the build, but you need so many different sizes, I bought a Screwfix kit of assorted Panheads, just as good for pocket screws. back in the 90s, we had a rep come round selling kits of square drive screws we bought loads, but all gone now. I think they might have been invented up the road from us in Shipley, never had one slip, dunno why we still have crappy Pozi drives and Phillips.