I'm at the planning stage for my RV-7 Slider panel. Looking at G3X fully IFR setup with G5 backup. I'm wondering if anyone has managed to fit a GTN-750 into an RV-7 Slider without using an extended height panel? If I went with a remote audio panel (controllable I believe from either the GDU or the Navigator), remote second comm and remote transponder, would I have room for a GMC-507 A/P controller above a GTN-750 in the centre? Would any modifications to ribs be required (I believe that I'll need to cut a hole in the sub-panel for the 750)? To free up panel space I am planning to use fuses for many circuits rather than breakers. Any thoughts or advice much appreciated.