Hello, newbie here, I have a G5122 Electromatic and I recently wanted to switch from .9 to .11 string set, but the intonation got too bad (I am capable of rod tuning with standard bridge guitars). For a new project will play, I have to use standard D tuning, and having not much knowledge about strings myself, local dealer offered me D'Addario EXL 116 11-52 saying it fits drop tunings. (https://www.daddario.com/products/g...16-nickel-wound-medium-topheavy-bottom-11-52/) After putting on strings, I move on to intonation but I witnessed a scary -75 cent general different between open and 12th fret. Whatever combination i tried, the closest cent I have seen was -50 and not to break the rod, I stopped touching the guitar and here I am I did many truss rod ajustments in the past (first time with gretsch), but I have never seen this big difference before. My fretboard is nearly straight and my bridge screws are about 0.5 cm high (~0.2 inch) right now. After unsuccessful attempts to fix the rod, I have started to wonder fitness of strings with this guitar, or the health of my guitar neck. Any advice is much appreciated, thanks in advance.