This is really really bad! And I'll tell you why. I decided to measure the actual tension of my drop weight stringer with the clutch/rachet by using a fish scale which is a very common method. I have a fixed clamp system by the way.
I tested it with the racquet mounted and simulating how I would pull the first main string with a starting clamp, clamping the string on an adjacent hole on the inside of the racquet. When there's no friction at all like pulling with the head of the racquet pointing toward the string gripper, the tension was dead on.
Now, when tensioning the opposite way, with the string bent under the frame, the tension was CONSISTENTLY 2-3 lbs lower! I tested and re-tested many times, and it's still 2-3 lbs lower. The friction resulted from the bend reduced the tension by 2-3 lbs!
I also tested the tension without the frame mounted, and the fish scale showed that the tension was dead on, meaning that my drop weight stringer is good.
Lesson learned was that any kind of friction will result in significant tension loss. duh! I can't imagine how much tension you are losing by pulling 2 mains at a time, let alone pulling two crosses with the mains already in.
As for cross, I used to reduce about 2lbs lower than the main, thinking that the cross is shorter, but after seeing how much friction can reduce tension, I am stringing it at the same as the main from now on!