Here's the question. I currently have a Garmin 530W & 430W in my panel. I am thinking about trading those in for an IFD540/IFD440. Everything I've read is that the Avidynes are direct "plug and play" replacements for the Garmins. Same tray, same connectors. Can I use CFR14 43.3 and 43 Appendix A to exchange these myself, as the owner? It seems to me like it fits the description. Has anyone done this or heard of it being done?