A pole is usually made of aluminum or steel pipe. You can get these wherever you get metal. :)
As for polls, there's a check box in the "Additional Options" section of the New Thread page that you can click to create said poll. - Chris is me [more]
During the fall of 2017, Cyber Blue completed performance testing of CIM, MiniCIM and VEXPRO 775 based drives. Multiple numbers of motors and combinations were tested. This report summarizes the testing.
Detailed thermal analysis of the standard 120A main breaker, especially addressing the question of whether or not there is any practical benefit from using canned compressed air to pre-cool the breaker before the start of a match.