Lakeside53
Stihl Wrenching
If your just going to use HSS inserts, I can't see the point in that. Just get a blank, you have much more to play with.
I agree. They are super handy for cnc when you need absolute repeatabily, but less interesting for a home shop.
I have about 100lb of quality HSS cutters - most free from various auctions and machinest garage sales. Some of it is even marked "SST only"; for the non-Seattlites, SST means "Super Sonic Transporter" - a sure sign the guy worked on Boeing products.
Brad - Tooling is expensive. Rather than loading up on Shars type stuff, start monitoring your local Craigslist tools section, and hanging out at machine shop auctions and estate sales. I have a very nice array of quality tooling and inspection (measuring) equipment from such sources. The second area of $$ is materials. Even though you think you are just going to turn piston and cylinder bases, there is another world Start collecting all the aluminum, brass and quality steels you can find. Any surplus makes great trading stock with the new machining buddys you will meet.
And... about those machining buddy's - find one. Machining may appear to be a something you can self teach, but this is one area where experience can save you a bunch of time, frustation and $. There are some good forums (like http://bbs.homeshopmachinist.net), but you'll not be welcome on Practical Machinest if you mention Grizzley; the owner/moderator bans such talk.