well,I made the jig with the pin aligned to the drill bit in the Drill press with a stop in 1/4 inch, the i used an old chisel that i got i dont know were with a plastic hammer to get rid of the chunks,it worked pretty good,then became tricky cause i dont wanna thin the platetoo much,I was using my orbital sander but took too long ,so i went and chiseled again,problem is I got some chips that left little holes,anyways after that i sanded and it seems to be oK, i only hope that I dont cry when i have to cothe same in the maple back,i arved maple before but always just the top and used even a grinder with the sanding device,didnt have to follow any pattern or thickness ,this is very different, by the way, i already ordered some spruce from someone on ebay ,I know it will be better tonewood and hopefully i ll heve a better idea of what to do by then.