Just so you know .... the plate came from McMasters Carr...... it's 3/8" thick and was a 36" long by 8" wide .... we cut it down to 28" before we started.....
Find Center ....bore the center hole 3.100" ..... then 4 1/4" bolt circle .... 6 pins..... .530" holes
You need a 3/8" plate so when your dial indicators are out at the ends it will be stable....
