More of a heads up than anything, but wanted folks to know in case they were thinking of combining these products. The XSPC D5 Vario pump does not fit in the pump cavity for the Protium pump top. Its just sliiiightly too big. I've looked up the Performance PCs video on assembling these tops, and their pump slid right into the cavity. I find it odd, since I assumed any D5 would fit. I can provide the product number if anyone is interested. Might be good to include this in any future compatibility info. Thanks much.