Qidi Tech 1 Heat Chamber Extension

This is a heat chamber extension for the Qidi Tech 1 printer.
I previously created a ventilation kit for the Qidi Tech 1, which greatly reduces the toxic fumes in my living room (https://www.thingiverse.com/thing:2434003).

However, since the normal heat chamber has quite a big hole in the back, some fumes and small particles still were emitted. So, I designed an extension for the stock heat chamber.
It consists of a upper frame in two parts, a lower frame and two supports to connect them (p