Creaking when pulling tension

#1
I strung a tennis racquet for the first time this weekend and I was a bit surprised by the amount of creaking noise the racquet made when I was pulling tension.
The racquet is a 6.1 95 16x18 last iteration. The string is a Gamma synthetic pulled at 58 pounds. The machine is a dropweight 6-point old Gamma Progression 600fc. I used ATW Universal for a one-piece stringing as shown here:

I found this video where you can hear similar creaking sounds:
Is this creaking normal, or am I doing something wrong with the mounting?
Thanks!
 
#3
I use to string on a friend's Gamma Progression II ES and it creaked like that. It's the machine, not the racquet. I didn't feel like it was adversely affecting anything. I now have the same setup as that second video (new Progression II + Wise) and I have no creaking while stringing the same or any other racquet. It seems like it was an issue with the older Progression machines.
 
#4
After you mount the frame, grab the handle and try wiggling the frame. If it moves easily, then it is too loose. It should take a little effort to move the frame. 3¢
 
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