1. What's the total weight?
Not the lightest, but most of the weight is in the hubs, as they have steel axles R:1012g, F:844g with Spesh rim-tape
2. When you say the rotor position is a bit off, does that mean inwards or outwards?
Front is slightly towards hub for some brakes (I have used a hope rotor shim for some PM Formula Oro's I had but IS front Magura Marta was fine)
Rear is slightly away from hub (Oro PM was fine but IS Magura Marta needed frame facing slightly)
Hope that helps!