Today I bought 100 Nespresso coffee capsules and a new chain for my bike.
Why the new chain, Mottie?
The reason I ask, if it was for reasons of wear , it is good practice to also change the chainrings and sprockets too (as the whole drive train tends to wear to match itself).
Therefore, your new chain won't match your worn cogs.
However, you'll know far more about mechanical stuff than I, and will be able to judge this for yourself.
And you'll have an excuse to do some more fiddling