Speaking to an old fitter today at a local trade counter he swears by motzart blades, he only ever uses straight blades too. Got to admit i'm a sucker for hook blades for all my vinyling needs, straight rarely comes out.
Those floorit blades are the ones I was talking about. Really good hook blades, haven't tried the others. I get them from cfs
I use Sweeney Todd heavy duty straights, concaves and janser super hooks for carpet and vinyl and when there to blunt for that I save them for my safety flooring!