I am thinking of buying a larger machine and am looking at a used Singer 211a1121k with the air foot lift or a Thor GC1541S for twice the price. My current machine, a Mercury M-337, is limited to 3/8 inch foot lift. I have a table and motor and am space limited so I can't have another table but can switch heads. I should contact Keystone sewing about a Juki 1541 since I am about an hour away. Which machine would be better? The 211 has a foot lift of 1/2 inch and the Thor at 5/8". Here is a video of my Mercury.