I would love to see your work Greg Pauline too. I recently attended the GRS training course in bright cut engraving taught by Diane Scalese and it's opened a whole new world for me in engraving, and I am very grateful for her passing along all she knows-it was a week week spent trust me.
The only thing briefly I can add for sharpening your flats-we used a 45 degree face with a 20 degree heel-not 15. That heel is radiused too on the powerhone-loosening the set screw and slowly letting it drop as you press down (on final ceramic polishing stone) to make the curve gradual and not sharp angled-if that makes sense.
600, then 1200 diamond stones then ceramic lap stome was the progression, and a mirror and I mean MIRROR finsih is crucial-stropping with leather coated with diamond spray is a good idea too. I'm no pro at it
yet but even initial results are extreeeeemly rewarding.
We all look forward to your posts Greg Pauline -thanks in advance
Paul