OR75

probably easier to install the whole mag to the engine accessory panel (assuming you know how to find 25degree BTDC, have the tool to lock the magneto to the K position - don't forget to take it out before touching the prop -, have new washers, can check timing and torque the bolts)

like it was said above, separate airworthiness items vs and others . to get a starting number, a J inspection should be about ~25 hours. At some average shop rate, that's should be about $3,000 to change the oil/filter, (tough to avoid when doing inspection) adds a few $100. So round it to $3500. The shop owes you a list of discrepancies (A/W items) that will need to addressed. You can take your plane to another shop to take care of those. non A/W items , you can decide to take care of or postpone. The gear pucks are likely not A/W items.

at what settings does it buzz ?

give it some time for the counterweights to re-seat

I have a C212 with bulkhead / spinner I can sell

the cleaveland brakes assembly catalog is readily available online

I have one. Last updated in 2017 (America region coverage). pm if interested

too many OATs !!

RG-400 is ... RG-400 honestly where you need quality is the connectors . You will likely need a 90 degrees TNC connector for the GPS Make sure you take your time and do quality crimping

to your 1st question: steel braided

a few years ago , worked on shimming the engine. Could not torque the nut because the wrench would not fit between the pushrod and the nut ... so I decided to go the the hardware store and buy the cheapest wrench and grind it (I did not want to ruin the snap on tool). Guess what ... I did not have to . The cheap made outside the US wrench was thin enough but it did the job !

both G5 coming up as ADI is correct IF you power the HSI G5 first When you have 2 G5s, the first to get power will go into ADI mode

I am not sure what the issue or anomaly you are seeing but the G5 ADI is supposed to be connected to the main bus and start as an ADI the 2nd G5 (HSI) is supposed to be connected to the avionics bus and start as an HSI (unless it senses from the CAN bus that there is no ADI connected in which case it starts as an ADI)

price ? diameter ? compatible with the IO-390 STC ?

thats why I specified not looking for ADs on equipments installed with an STC Looking for all the ADs that apply to an M20J (and some will not be applicable because the S/N)