Well, after lots and lots of drama (managed to un-hook the cam chain from the lower idle gear, amongst others), after advancing the front idler gear 1 tooth and retarding the back 2 teeth, after measuring, re-measuring and triple-checking, here are the results:
Intake lobe center: 106.25
Exhaust lobe center: 108.9
Intake lobe center: 105.5
Exhaust lobe center: 111.25
So, front cylinder is right on the money!!!
The back one, not so much. I was expecting 107.02 for the intake and 110.23 for the exhaust... Probably botched up the measurements?? I don't think it's me unhooking the cam chain, I didn't move the rotor and I had painted both the cam chain and the idler gear so I knew exactly how to restore them to their original position. What do you think?? Should I stick with what I have now, or go for 3 teeth advance which should give me 106.07 for the intake and 110.68 for the exhaust??