I finished my crack today! What fun. Thank you for producing something so awesome, I've not even heard it yet! The instructions are brilliant. doing the resistance checks I found one was not quite right. Using 12 as a ground I got 1.177k ohms at 7 instead of 2.9k ohms. Similarly with B3. The other side reads fine. Also at 13 it's been dropping slowly from 5k ohms, instead of climbing to 270k ohms as you suggest. Everything else checks out. So close! Any ideas? Thanks again , Jeff