[Dovetail Jig Reccomendation]

I have a Porter Cable 4216 DT jig like this  
https://mechanicguides.com/best-dovetail-jigs/ which is a deluxe version of their basic  4212 DT jig.  It works pretty well for a variety of basic joints.Once you learn to use them, they are worth their weight in gold.The only drawback is they always produce machine-made joints that look machine made. They are very uniform which is good for draws that folks don't look at all the time. But if you are making furniture with exposed joints, these machine-made joints are..not exactly what you need

[Dewalt batteries 18v vs 20v]

Dewalt is maintaining the 18V lineup but will probably eventually convert everything to the 20V Max lineup. They insist that they will keep selling the 18V tools as long as there is user demand for them.

But if all your 18V tools are available in the 20V Max lineup, and your buddy is willing to but the whole 18V lot from you...

Many/most of the 20V versions do feature improved ergonomics, features, or specs.

[Better brushless 18v circular saw: DeWalt or Milwaukee?]

I have the 36 volt (2 battery) saw. The one with the blade on the right side. It has a lot of power and cuts like a corded model. I don't like the blade on the right saws, so I'm getting ready to buy the newly released 36 volt model with the blade on the left. I also have the 18v 6.5 brushless saw. Its a very good saw in my opinion.