Home built DIY Lipadary flat lap 10in rock polisher $90

Home built lapidary flat lap for $90 including abrasive disks . Works great. Parts used  1/3 hp motor ,  cattle pan , sink drain , handrail flang, compressed gass cylinder, hanger iron , 1/2 to 1/2 arbor, 120v light switch, 1/2 of an old bulk water tank lid and a purchased 10in al master lap disk.