I'm about to order a PCNC 1100 mill and need to decide about 4th axis options.

Tormach offers both 6" and 8" rotary tables and 3-jaw, 4-jaw, or 5C chucks.

I'm inclined to get an 8" RT with a tailstock and 3-jaw chuck. The 6" RT is only 20 lbs lighter so it doesn't seem worthwhile to consider it, but I'm wondering if a 4-jaw chuck might be better than the 3-jaw chuck.

Any thoughts?

Mike