fitting my new cusco camber tops (best camber tops on the market in my opinion) they then used the spacer that comes with them directly under the bearing with a washer and then a 20mm spacer just above the top hat.... to fit that all in they had to bore out my top hat which allowe dit to slide further down the strut, giving extra room... now the camber tops dont even come close to touching the top hats..
Stolen from another site.
All your really doing is moving the top hat further away (20mm)from the camber tops to stop it from binding.