Taller cooler without modding? Probably 149mm max with the side metal on top, 146(ish) with the plexi...But the plexi is easy to mod, which is how I'm fitting a 160mm tall cooler in my V1 build.
A 145mm Cryorig H7
would be a safe fit. The much better 149mm Scythe Fuma
would be pushing it without a little tweak of the snips. But, the V1 is made for snipping!