VCA - I quite fancy a https://www.modulargrid.net/e/worng-electronics-vertex to go with my Chainsaw, though I'm currently using the ST Modular SVCA though I find it all too easy to colour the sound with it and I get a better result using 2 channels of MI Veils.
I'm currently filtering with the Patching Panda Moonphase which is alright, I may get a DIY Stereo Ripples at some point or as others say the Dual Dagger maybe.
Enjoy your spare HP, don't rush to fill every last space, this is not like filling sticker books. Resist the urge to 'complete' your rack, its never complete so just relax.