Man, a shop is going to have to charge $50.00 per hour to mess with that. Sounds to me like a good excuse to buy more tools! Sears should have some hex drive drills
in stock, that could easily be extended with an adapter. Drill those things out with a 3/16" or 1/4" bit, and re-drill and tap them larger with a 1/4-28
or 5/16-32 set screws or socket head cap screws. Once you've done a couple, it will go easier and you won't hesitate to do it in the future. Turn a small setback into a 10 minute repair, with an upgrade to boot. Oh, and new tools, too!
Save your receipts for the drills in case they don't perform to your expectations.
A hammer with block of wood or urethane faced hammer
ought to take care of that stuck gear cog adapter. Probably have to clean up the shaft with a file after it's forced out. Yet another tool or two to add to your ever growing collection!
Yeah, that sounds like a good idea, but what you don't realize is that the freewheel adapter behind the stuck on cog adapter has a set screw that can't be removed while the freewheel is on it.
So punching out the shaft is not as easy as it sounds.
The shaft is probably going to have to be drilled out.
I've tried doing this myself, and I have pretty decent tools, but some things are better left to people with experience and tools the avg. Joe just doesn't have or have room for. It may cost me a little more, but in the end, it will be done right.
When you're not paying for the expense of maintaining a car, a couple of hours of $50/hr. labor is still pretty cheap.
The shop I plan on taking it to will probably charge about $50 tops though because I won't be in a hurry and the guy can just do it when he has some time. When I went in the other day for a little work the guy was in the middle of building a $17,000 multi-head remote retractable shower head system.
He stopped working on that and fooled around with my thing for about 45 minutes and only charged me ten bucks. When your building $17,000 shower heads you're not gonna try and get rich off the guy trying to put an electric drive together on his bike. I think it probably helped that the owner of the place had a serious collection of collector bicycles in an upstairs climate controlled section of the shop.