I am amazed at the accuracy of the simulation and very happy with the results.
I needed a solution for a vertical up-swing door for my CNC enclosure (38 tall, 48 wide, 16 lbs, made of wood and plexiglass). No other company I found had the tools to complete a visual simulation of my scenario, and a couple well-known retailers simply admitted their gas springs were not up to the task.
I used the online calculator, placed my order, and it was delivered 3 days later. I printed out the instructions, which were specific to my setup, including critically helpful measurements, and assembled it all the next day.
After assembly I crossed my fingers as I closed the door for the first time. Perfect amount of resistance at the beginning (top/fully open) to get the closing started, less resistance in the middle, and then with about 10 inches of travel left in the closing, the springs gently pull the door the rest of the way closed and hold it tight against the frame. Finally, the reopening happens unassisted once the door is pulled about 10 inches out, it travels upwards quickly but not unsafely, then it slows down the last 10 inches or so to gently come to a resting position ? Exactly how the simulation showed it would.
My father, a former farmer, retired electrician, and current woodworker, is my go-to mechanical consultant. He's had mixed results trying to choose and install budget gas struts for his needs, and he helped me with the install (he basically did it). After seeing the first close/open after the installation, he turned to me and said, I need you to send me a link to this company. High praise.