Step son did it with his OGK black insert, he thought it was a bit dark, and could not see through it well, so everytime sun went away, he'd stop, take it out roll it up, place in jacket ride on. When sun came back out, he'd stop, and put the insert on.
He took his CBT on 1st October 2003, and put the insert in on 2nd October.
Fast forward, family meal at very nice pub, he's ridden the 'ped there, and decides to ask me my opinion. I spot the problem straight away. the date? 24th December 2003...............!!!!!!!!!!!!!!!!!!!!!!!!