Help with parameter selection

You can control the dimension of the ciphertext modulus by setting parameters.SetScalingModSize (size of one limb), parameters.SetFirstModSize (size of the first limb) and parameters.SetMultiplicativeDepth (total number of limbs). However, when determining the ring dimension in order to get a certain security level, it matters if you are using Hybrid Key Switching, which uses an extended ciphertext modulus. This can be controlled by parameters.SetKeySwitchTechnique and parameters.SetNumLargeDigits. Checkout how to print all limbs here OpenFHE CKKS chooses modulus chain that doesn't guarantee 128 bits of security.

Further, please check these discourse posts discussing dependencies and how to set the bit size of the moduli.