EElevator when you do the Otis belt Tensioning you can plug the blue tool in and read tension. you want to get them within 10% of each other is what i was told. Also you have to run the hoistway with the car after making adjustments. As for marring the belts to pull through on the small belts I only do 2 holes big belts 4 holes on the end of each belt like you do and I use 2 wraps of seizing wire instead of fishing line. Once I'm done with the seizing wire I put it on the handrail and give it a few taps with a hammer and Then I use the filament stranded packing tape and run a 6" piece on the top and bottom of the belts splitting 3" on each belt.