If you remove your vice a lot like I do, do as follows.
1. Mount an angle plate on your mill parallel to to x axis.
2. Flip your vice over and clamp it on the angle plate.
3. Put a jack under the "long" side to support the weight.
4. Indicate the vice in the Y axis to .000 +/- .001. Use the jack for this.
5. Mill a slot aprox. .050 deep, centered on your "bolt down ears". Cut the slot WIDER than your T-slot. I.E. 3/4 slot for a 5/8 T-slot ect.
6. Now get a piece of 3/4 key stock, screw this down into your new slot. (Drill and tap ect.)
7. Use some gauge blocks and measure your T-slot in your table.
8. Mill your key on both sides to this dimension, staying .001 off the bottom of your vice.
9. Remove set up and install vice.
10. Install new soft jaws and machine them in place.
11. BAM! Perfection every time you remove and install your vice.
P.S. match mark the key to the vice so it can be removed and reinstalled.
1. Mount an angle plate on your mill parallel to to x axis.
2. Flip your vice over and clamp it on the angle plate.
3. Put a jack under the "long" side to support the weight.
4. Indicate the vice in the Y axis to .000 +/- .001. Use the jack for this.
5. Mill a slot aprox. .050 deep, centered on your "bolt down ears". Cut the slot WIDER than your T-slot. I.E. 3/4 slot for a 5/8 T-slot ect.
6. Now get a piece of 3/4 key stock, screw this down into your new slot. (Drill and tap ect.)
7. Use some gauge blocks and measure your T-slot in your table.
8. Mill your key on both sides to this dimension, staying .001 off the bottom of your vice.
9. Remove set up and install vice.
10. Install new soft jaws and machine them in place.
11. BAM! Perfection every time you remove and install your vice.
P.S. match mark the key to the vice so it can be removed and reinstalled.