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The value of capacitors for CS and CP will depend on the parameters of the xtals that you are using.

Have you matched a set of xtals for the filter ?

The input and output impedance for the filter should be close to 200 ohms.

There are many documents on the internet which cover matching xtals and building filters, you could start by googling G3UUR who developed a very simple method of matching xtals for building filters.

Regards

Andy de G6LBQ