Suggestions on force sensor installation

I'm trying to place a force sensor (1.5" square from polulu) on a servo motor by using biadhesive tape.
The problem is that the sensor is a little bit larger than the servo and so it flexes a little bit and this causes the readings to be very instable.

Is it possible to trim the sensor to make it fit the area on the servo?
Moreover, I realized that if the tail is not rigid the reading are not accurate, too.

Can you suggest me a solution, please?
Should i use another sensor? I checked on polulu website and the other sensors they made are very small compared to this one.

20191224_182543_resized.jpg

20191224_182543_resized.jpg

marcusbarnet:
Is it possible to trim the sensor to make it fit the area on the servo?

Ask Polulu if that's possible. I doubt it, but you never know.

Can you suggest me a solution, please?

Stop it from bending: attach a stiff plate behind it.