Deep smooth Manta/Reflex sweep

I posted this in the SA thread but feel I might get a better response with its own thread.

I have just started working my way around the Manta and Reflex. So far I am enjoying the combination but I am unsure weather or not it will kick my Xero Dlx off my board. In a way I really want it to, as I am wanting to create space for a H9.

The manta does the sweep but it seems less smooth/long and deep in comparison to the Xero. Anyone have any tips on how to make it do a long LPF sweep better?

P.S. I feel the issue is from the Reflex not the manta. The reflex has a smooth deep sweep with the Xero Dlx but the sweep with the manta is really short.

Help please- I'm sure it's fixable but I am a beginner with the Reflex/Manta

 

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My only issue is Xero is not midi programmable.