I found it to be useful to stabilise temperatures and virtually eliminate warpage on large coverage prints. It also dumbs down the fan noise too.
Its produced in durable PETG, very easily installed and has a lift up lid. brackets were made in Z ultrat.
fixings - 6x m5x12mm, 6x m5 nuts, 12x m5 washer.
lid and surround cover are laser cut and heat bent. Solidworks files available in the downloads.