Hi DMF,
Thanks also.
If I understood well your answer the pin can use in a new chain only and can not repair the chain after 450km of use with the supported chain.
I look for a solution and find a KMC m
"MissingLink" for 7 and 8 speed compatible with Shimano chain. That probably I can open and close more time when I need.
Hope it will be a good solution.
Best regards,
losi