Our dishes are pretty much identical. We had the same length LNB rods and the same size dish and the LNB definitely wanted to go forward. So I looked at where you put your rods and you indicated that you went a mite far so I did mine just a little bit closer than yours. Instant huge signal spike and the LNB was happiest right at the .40 FD setting. Imagine that!!
Looking at your original thread along with reading his response on the other forum it seems that they measured from the apex at the back of the dish which is covered by the front and back center plate. And of course not knowing any better we install the center plates and measure from there. I'm right at 44" now from the center plate to just inside of the LNB throat. If it's expected to measure from the back of the dish without the center plates installed that is something they might want to mention. Experts with the dishes probably know to do that by rote but for novices we don't. So anyway the signal levels are now a lot stronger and I have the skew fine tuned and now picking up a lot of the S2 and 8psk feeds. I went back over the satellites I already found and am finding many more channels now. I still have to find every satellite in the arc which I'll work on this weekend and once I have all the sats I can get then I can do the process of fine tuning with adjusting the true north and then adjusting for elevation at the zenith and declination at the ends of the arc.
I wanted to thank you for documenting your experience as that showed me right where to look and you saved me a few days of frustration. Overall very happy with the dish as well as the quality and the wind is blowing pretty good today and the dish is rock solid. A real learning experience here and hopefully others can learn from the experience.