Thanks Doug, that's kind of you but you can hang on to them. I've learnt that once someone feels they owe you a favour...you should hang on until you need a big one
When it comes to slot orientation, I don't know what I was thinking saying it should be radial, they should be either perpendicular to radial so as to improve aerodynamic efficiency when turning, or no specific direction so long as the torque is correct to 3 decimal places. Radial looks pretty but it really is style over function.