I'm assuming that the 796 parts are the same as my Evo.
When you locked the camshafts, did you lock both at the same time or just one? The belts should be changed with the horizontal cylinder at TDC. If you lock both cams, then the locking pins will only locate in their holes when the motor is in the correct position - if only one pin is used, then the motor could be in the wrong position.
Also, even if you lock both cams, if you don't also lock the crankshaft, there's a possibility that you might accidentally move the crank out of position when refitting the belts.
Finally, when tensioning the belts, (and while both cams are locked), you need to loosen the three torx bolts (no. 4 in the diagram) on each cam pulley so that you can correctly tension the belt run opposite the moveable tensioner.
As you can see from the diagram, the pulleys themselves are slotted and can rotate slightly independently of the cams so that you can evenly tension both sides of the belt, (without affecting the cam timing). If you don't do this, then you are effectively only able to adjust the tension of the side running against the moving tensioner.
When finished, tighten the torx bolts up to 10Nm.
What utopia says is very good practice - any time you disturb the belts, it's wise to rotate the engine a few times by hand (plugs out) to ensure there's no contact between valves and piston.