Thank you. I could not figure out how to change the nav radio frequencies in the sim, only the com frequencies. Its a bit awkward, holding down left mouse while clicking right mouse. Also took me a while to manipulate the small knob for the decimal part of the frequency. Strangely, it intercepted the glideslope this time but not the localizer. I am not used to the GNS530, I have the Avidyne IFD540 in real life, so I might have inadvertently changed something in the flight plan, not being familiar with the menus, loading and activating approaches and whatnot. I will give it more of a go, but that was a big help just figuring out how to change the nav frequencies.