I have a few hand braces and a set of Irwin Auger Bits. The braces are all vintage and have two-jaw chucks (some have alligator springs, others are basic and flat, etc.). which are appropriate for squared tapered shanks, but could (I imagine, particularly for the alligator style jaws) handle some other shanks.
My question is: In addition to the typical full set of 4-16 Auger bits, what other bits and attachments would enhance the usefulness of these braces and where would you get them? Also, which ones would NOT work on a hand brace? For instance, would you use a HSS forstner bit with a round shank, intended for drill presses? Would the round shank even be gripped correctly by the brace? How big the diameter before it's just too hard to bore with it? Would you drive screws with it (the LV adapter comes to mind here)? What about counterboring and countersinking? Would you use it with a spindle sander drum kit? (Ok, I am just kidding on that last one! )