It is difficult to determine the smoke's true color from the video. However, it looks very white to my eyes, which is highly suggestive of coolant in the combustion process. I highly recommend you purchase a NOx tester to evaluate if any combustion gases are present in the coolant loop. If yes...
Okay. I recommend trying a bonded washer, but make sure it's made of fluoroprene, viton/FKM, or fluorosilicone to ensure it's resistant to ethanol.
Your washer+oring trick will probably work, but if you want something more permanent this should do the job.
The LCA bolt is much easier to align if you use your lugnuts to bolt four LARGE box wrenches to the studs (or lug bolts to the hub) at 12:00/3/6/9. Becomes very easy to horse that hub around, especially lining up the RLCA and/or the last arm to bolt up, which is always the hardest one.
The tuner does not need to be local to you. You can be tuned by anyone on earth.
I personally use Xavier (SumoTuned) and have always enjoyed his responsiveness and results. I'm sure others would have good suggestions, too.
But you can just email one of these options to be tuned.
You will find that most of these are basically identical. Roughly 4K spring rate front, 12K spring rate rear. HKS, Fortune, KW (dba ST Suspension) -- all decent brands.
There's not much to compare except price. They all do the same thing and have about the same specs. They will all be less...