I tried sending this message directly to you but the message bounced. So I'll try it this way.
Sorry - wasn't me. I did the Forty Cent Method for setting the gap between the bit and the chisel. That's at www.wood-workers.com/users/charlieb/MChiselBitSettingTrick.html
There's a little about tuning them up here, about 1/3rd of the way down (near photos of before and after polishing a chisel) but it's not really a "how to" and I did nothing to the inside of the chisel.