i can still make salt mine there my silly lightshot playing up so couldn't show with min in place if i was to build one hence the red square instead http://prntscr.com/bgnind but them 2 i know i had get the placements spot on if the bottom one was just a bit off right place top one wouldnt work when i did them ones
edit
http://prntscr.com/bgnke2 got lightshot working