The rings are lined up with either math,or a PAG,(Precision alignment gauge),there is a chart out there when you get all the measurments to what angle you put the cutting blades, the ring is no problem you can sometimes get them close,I believe the one in my picture the first one i did and you have to look hard to see the hole, You could do away with the threaded bolt on the ringmaster,,and glue a piece on the board like on the lathe, but its easer to do it on the bolt,Before i did buy the RM i did it free had, lots of sanding that way,and theycame out nice, but this way im not free handing and it safe,Check it out its fun to take a change from making pens,I am actually enjoying it more than making pens