Originally Posted by JamesXP
Thanks for the advice so far..
Are there replacement control plates with bigger holes for the pots that will fit the squier or are the fender/squier pickguards interchangeable?
Most of the replacement control plates will have the larger holes for the CTS pots. I say most because there are some sites that sell the Squier plate with the smaller holes. It's not hard to drill the smaller holes out to fit the CTS pots. The other issue you will probably run into is a slight difference in the shape of the existing plate versus the shape of the new plate. Specifically where the plate meets the pickguard. Many times they don't fit against each other. Unfortunately, this is where the differences between Squier Jazzes vs. Fender Jazzes become a real drag.
To see if you need to rout out the control cavity or not, put the CTS pots in the new control plate and see if they will fit in the existing cavity. Some of the ones I have done did not need any routing and some have.
In short, it can take some time to do what should be a simple upgrade. That's the best I can tell you.