There's nothing wrong with inserts for the plugs assuming it was done correctly. Which, if it hasn't blown back out, it likely was. Do the maintenance. You've done this much, too late to back out now. Truck is looking good. I would send the panhard back and get the PCK from
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eimkeith
. Even with a longer bar your geometry will be off. Also, nothing wrong with the spacers. You could ditch them and go up a perch but your preload will be higher. Preference really. Just make sure you have the correct bumps for your lift and you'll be fine.
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18 Audi A6 3.0T - APR Tuned, RS6 Interior
19 Audi A6 3.0T