PwnageTool 3.1.4 (Pi) released... Still hitting 16xx errors on your Mac?

For those of you with 16xx errors on a Mac... here are your "best practices" fixes by device: 

iPhone (1st gen) 
1. DFU mode restore to official 3.0 IPSW 
2. Use redsn0w 0.8 to Pwn (just Pwn, no need to unlock here) 
3. Option + restore to your Custom 3.1.2 FW made with PwnageTool (with unlock applied) in normal mode (no DFU, no recovery) 

iPhone 3G: 
1. Get a copy of iRecovery (learn how to use it... BenM has an excellent written and video tutorial on iRecovery complete with downloads) 
2. DFU restore to stock 3.0 
3. Run into 1015 error at the end - apply iRecovery commands to reboot to activation screen 
4. Use redsn0w 0.8 to Pwn 
5. Option + restore to your Custom 3.1.2 FW made with PwnageTool in normal mode (no DFU, no recovery) 

iPhone 3G[S] - with ECID SHSH for 3.0 on file 
1. DFU mode restore to official 3.0 IPSW 
2. Use redsn0w 0.8 to Pwn 
3. Option + restore to your Custom 3.1.2 FW made with PwnageTool in normal mode (no DFU, no recovery) 

iPhone 3G[S] - without ECID SHSH for 3.0 on file 
1. Delete the "recovery" file in ~/Library/iTunes/Device Support 
2. Restart your system. 
3. Rebuild your custom IPSW with PT and follow PT instructions from there...


UPDATE:  Keep in mind that these fixes are only applicable if you follow PwnageTool's instructions CORRECTLY and are still hitting 16xx errors...  There is obviously no need to do any of this if you are able to restore OK with PwnageTool...