OPR Objective Marker

Based on Warhammer Objective Marker by lfactiondesigns https://www.thingiverse.com/thing:4599945 but I wanted 6inch total objective size for One Page Rules. I made the hole bigger to fit the smallest magnets I have (3x2mm). this makes the hole go all the way through the cap but I didn't want to make it thicker, and as the cap is being glued to something thicker anyway it shouldnt matter.