Melm,
I'm unclear what your statement means, given that Srjan has not heard the stock 105.
In any case, I find the Modwright version extremely fast; incisive; airy; flat (as in neutral); very resolved, separated and focused; not soft on leading edges, image outlines, and bass control (I'm particularly surprised by the latter observation); and not "bassy." I can't help wonder if this is a system, cable, room thing. My other equipment is very high-end solid state, and I'm using the best power cords and power conditioning I've been able to find.
In any case, one can change tubes and get different sound "to taste."