That chain breaker on Ebay looks like the one I got from a motorcycle store. They told me it would work on my #35 chain for my motor bike. The tool pin pushes the chain pin not all the way through as the tool pin is too large. Forcing it any would either break the tool or deform the chain. I may see if I can get one that is exactly right and does work on #35 chain. Temporarily I used the tool and also a center punch and a vise.
I am using a master link and not putting the pin back in, but if I to were to reuse the pin would it be possible to re-flatten out the ends of the pin? I suspect there is a fair amount of friction without that rivet type end on the pin, but you don't want a chain to come apart!
If you grind the edges of the chain pin it would seem there would not be enough material to flatten the ends of the pin to keep it better secured. I suspect you can get a new pin and not reuse the old pin, so keeping some on hand if not using a master link might be what I could do.