JohnMarkus

Usually get a 1/4″ T-handle allen wrench and a 3/16″ one

Most companies will let you custom design so you can reach out to them with your specs

Yes, why wouldn’t they be able to?

Ye, they are super versatile and especially considering you can do a lot of custom stuff.

Do make note to choose the right join configuration as well depending on what you need.

Yes I know Aluminium has a rep for not being as strong, but trust me they are. They should suit almost any project.

Should be easy enough! Super doable

Definitely. Aluminium is almost always the way to go

Common would also heavily depend on your usage and projects. I think most connectors are valuable depending on your project

I have used 80/20 in the past and they’ve been a pleasure to work with

Yup My T-slot aluminium hasn’t corroded and it’s been over 8-10 years

I think the cost and I prefer aluminium overall for framing.

As other have mentioned, they help keep things in place around the corners.

You can, and I have. But seems the overall consensus is that it is not recommended.