Welcome,
The 1211 code doesn't hurt a thing!!! It is simply your injectors asking for more oil pressure and fuel than what your system can deliver, when this is out of spec for more than 7 sec it triggers the 1211 code. A chip and a tuner are simply two different ways of enjoying the same tunes. I myself don't need switch on the fly as I stay in one tune 95% of the time, a chip gives you the switch on the fly capability. You also risk all the problems that occur when a chip comes loose ot the contacts don't get cleaned enough etc..... I have seen them cause some weird stuff. I myself prefer not to open the PCM, WHICH = NO SIGNS OF MORE PONIES BEING ADDED!!! My SCT X2 programmer also gave me a code reader which has come in very handy. I can store 3 programs on my programmer and the rest I keep on my laptop and swith them if needed, which isn't often. Used programmers aren't selling for much $100=$150 . A valvebody whould be a good idea, I like the FTVB by Greg Evans, just google FTVB to find it, or the BTS is also a good one. Redline for your EGT's is 1250 for sustained but short bursts to 1350-1400 is okay but not sustained. Any other ? feel free to PM me.
NCH