Hello all! I'm an electrical/controls engineer by day and farmer by night. I need some insight on an issue I'm having at the farm. We have a greenhouse where I've setup automatic temperature controls. A small PLC reads temperature in the greenhouse. If the temperature gets too high, we open the vent shown in the attached pictures. When the temperature goes low, we close the vent. The motor I'm using is a wench mounted on the wooden platform inside the greenhouse. I can change ropes as needed. The vent is made of plastic roofing material. It's actually 4 sections I tied together with a metal pole in order to lift all at once. I can cut this up as needed but I would like not to add any additional materials as to save money. I have other pieces of scrap metal to use as well. These are more metal poles like you see in the pictures. The mechanical setup I have right now does not work. In the pictures from the outside, you can see two poles in the ground. I was trying to lift from the outside. Ideally I'd like the movements to happen from the inside to avoid weather wear. Thanks for reading this far! I can build anything but just don't have an idea of how to make this one happen. Please offer some help! I'm open to completely new ideas or fixing what exists while keeping spending low and design as simple as possible. Thanks for any help in advance.