I put the Hewitt bypass on my 2010 Sequoia 5.7 about 3 years ago. I left all the sais parts on the vehicle. Absolutely zero negative effects. You did the right thing.
20280 was replaced by 20452 so they are essentially the same sensor. 29025 is a clamp in style. Take a look at your wheels and see if your valve stem is rubber or metal to see which one you need.
Blue Monster makes teflon tape with nickel in it for anti seize properties. It is called nickel guard tape. Stainless and aluminum are both on the approved materials list.
Get a bypass kit from Hewitt technolgies. Repairing the sais system on a 5.7 is money wasted. The systems are plug and play and will have no bad effects. I put one on my Toyota three years ago.
I picked up a 6 quart oil dispenser jug at walmart for $10. Every jug of oil I have poured in has been at the 5 qt line. Another plus is it eliminates the need for a funnel.
Not sure about that engine but I have changed them on a J series in a Honda Pilot. The plugs on those are aluminum and have bolts in them. They came out very hard and went back pretty tough too.
93 octane ethanol free is 4.84 per gallon at the station I buy it from in southwest Georgia. Another station across town charges $5.39 per gallon for no ethanol 87 octane.
Picked this one up from Napa a few months back. The seat cushion is removable so you can use it for a kneeling pad. I use it without the bucket. I paid $50 plus tax.
Have had the same 14 inch Ryobi saw you bought for a few years now. It has served me well. For limb cutting and small tasks it is perfect. Use the premix fuel in a can and you will be fine.