All comes down to proper tools. #5 is not hard. It's just 3 bolts that hold your compressor to engine. 2 upfront and one on a back. Pretty easy to get to. I did take them out so I can move compressor little backwards (more room)
Soo.. NO NEED to do this if you have good 90 degree snap ring pliers. First snap ring that holds pulley is almost on top and the one on a coil is little deeper, thats all.
As for locating pin.. Coil have to be oriented in certain position (wires going up) It can rotate. So, there is a small hole in compressor under coil and coil has small pin sticking out that goes to this hole. This is to prevent coil from spinning. Original coil has pin in a proper spot. But eBay replacements do not have it in proper spot and you need to grind it off in order for coil to be flush. But then nothing stops replacement coil from spinning. I was told that it's OK, it won't go anywhere. Worked for 5 years
Attaching pictures of original (white) and eBay (black) coils