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We decided to upgrade to a GTN 650txi (GPS/NAV/COM), Two GI275s (ADI and HSI), a GNC 355A (GPS/COM) with the GFC 500 Autopilot for our 1965 M20E. The problem is that we've got a tight panel and we use an iPad on a RAM claw mount for Approach plates (see before pics). It partially blocks visibility to several instruments if they're configured in a typical 6-pack. I'm always impressed with the comments and expertise on proposed panel layouts here so I've attached our plans. What do you think? Thanks! Background Information: Several factors have driven this large AMU spend on a new Garmin panel: 1. Desire to install an autopilot and enjoy it before Avgas restrictions, Health issues or Insurance costs terminate our flying. 2. Trutrak, Dynon AP delays for Mooney. 3. End-of-Life for our Garmin GNS 480 GPS/NAV/COM. (If it dies and we don't have a spare, it'd be 6 months waiting for parts and an opening at a shop since Garmin won't repair it). 4. Loss of features or finger-pointing when inter-operability issues arise in non-homogenous branded systems. (eg. Garmin AP with <insert company name> avionics). Several other decisions have driven a GI275 (rather than a G3x) solution. 1. AMUs 2. We're keeping the vacuum for the step, so we'll keep our vacuum AI as a backup. (There's not enough panel for all those round gauges, so we're picking and choosing.) 3. Awesome features.

Hello, I have been following this forum for a few weeks now and I am grateful to all the contributors for sharing their knowledge. I have just purchased a M20k 252 which has mostly the original panel with AP KFC150, hsi with flight director functioning perfectly. I do not have budget constraints but I do not want to spend money foolishly. If you had the choice between replacing the existing kfc155 radios with gtn750xi+gtn650xi keeping the 6 pack as it is or replacing just one of the radios with gtn750xi and adding a g500txi, what would you do? Thank you

I absolutely love my 1968 M20F! I really love everything about it, with the lone exception of my archaic engine instrumentation and the general lack of data it provides - like fuel flow and individual cylinder head temps, and almost useless fuel quantity estimates. Just as soon as one of those old suckers fail (or maybe sooner), I plan on removing it all, redoing my panel, and updating to some sort of a primary cluster type of engine monitoring system. I haven't decided on an EI CGR-30 Combo, JPI EDM-900, or something else, but I do prefer the round forms and think that at least aesthetically, they would look better in my panel. Because, I have zero desire to change out any of my round flight instruments on the left side of my panel - I really prefer the vintage look. (I fly glass at work, and I really don't need any more reminders of work) So...my question to all of our great mooniacs, experts and commentators out there is: Where should I put a new primary engine monitor(s), and how would you rearrange everything else that is left... Thanks in advance for all of your great ideas!