I now have full access to the 15M ('00~05 Big Blocks) and 15RC (Breva/Nevada/V7C & new Vintage), including 02-sensor/lambda, options shown here; http://www.guzzitech.com/store/GTRxECU.html
On the 15RC, I am offering a special exchange program for those who have purchased PCIII, and I will now also offer it as part of a full PC-V/AT/ECU package, pricing here; http://archive.guzzitech.com/store/GT-Rx-PCVATECU.html
Post below with any comments or questions.

