Hi,Rocket
Difference between SHG and SHM is quite significant.
Please refer their web site for the detail.
http://www.sh-router.com/shg1212.asp
They don't have SHM1212 on the web but.
My main concern is the height of the gantry. SHG is 120mm and SHM has 220mm gantry. Also SHG is ball screw drive, SHM is rack and pinion gear drive.
When I opened the crate, the machine was in very good condition and I saw some improvement they made to this machine. ( grease nipple to liner bearing.)
Unfortunately it was wrong model.
I don't know how this could have happened.
This is something you don't want to happening to your purchase.
But at least Jerry promised to get me the right machine.
I just want to receive what I have ordered and paid for.
I'll see how they handle this problem and let you guys know.