Thanks Karl .
The inserts have had the teeth cut off then drilled out . The metal pulleys have been cut down and made to fit a 18 mm belt and pushed in the insert , Then a hole is drilled and a pin pushed through ..making them very strong ....(You can see one of the pins in the first insert )
No more worn teeth .....
The next thing I will be doing is to have the 3 pins made up (the one's that the small cogs fit on) Also going to have at having the 3 small cogs made ....I have already had the the large cog made up out off aluminum.. Photo's to follow