Water Injection - EGT Pre/Post Turbo/Necessary?

[BlazedGlory]

I am currently installing a water/methanol injection kit on my built SR. I run a Power-FC (L-Jetro - Z32 MAF), Datalogit, and an Innovate LM-1 wideband. Without the water injection, I tuned my AFRs with the wideband, and I basically tuned the timing map with the knock sensor as a guide.

I don't feel quite as comfortable tuning the timing map with water/methanol injection, but I'm not sure if an EGT gauge would be beneficial or a late warning. Further, if I did install an EGT probe, I would feel uneasy putting it in the manifold pre-turbo. I know it wouldn't be near as useful mounted post-turbo.

Should I just tune the way I have been, or would EGTs be a very helpful thing to monitor?