Are the mounts for the XBOX 360 controller that are ordered to fit the Google Pixel 2 adjustable for phones with cases?

I am wanting to order this, but my Pixel 2 is already in a case, and I don't want to take it out of the case every time I put it into the UtorCase. Is it flexible / adjustable enough to allow me to place my phone in it while it is still inside a case? I have the live case (protective version) that google sells on their store. Will this be a problem?