I used a 135mm Componon for many years, very sharp even with large prints 20"x24", no issues with fall off at the corners - after all it's designed to be a 5x4 lens.

Now I either use a 150mm Rodagon as that came with my De Vere 5108, or a 135mm Componon S, I gave my 135mm Componon away with my old enlarger but have another.

There can be advantages using these lenses particulary if you use a bench rather than a floor standing enlarger.

Ian