I like the outside border. My idea is to reduce it down to a 4" coaster, take off about 1/8" on everything inside the border edge and then carve the pattern. Last thing would be to fill the insides with clear resin to give it a 3-d look and protect the design. I'm not sure how well the detail will translate to a smaller diameter, tho. I might have to use one of the alternate calendars with less detail.