If this is in an Intellijel Palette, I would strongly suggest removing the buffered mult and dropping this in instead: https://www.modulargrid.net/e/intellijel-stereo-mixer-1u This connects to the Palette's 1/4" jacks like a typical stereo out, but it has a parallel stereo input with a level control so that you can use it as an extra FX return post-mix. Plus, in a small build like this, multiples of this sort are pretty much a waste. In this case, you've got a dual buffered mult, but there's not enough destinations for a single CV to cause voltage sag. Stick with stackcables or inline mults instead.