I'm confident i can make it safe and durable. It would never lift at max height anyways, and a locking mechanism would be added for sure. I have found a good one on here, but the link takes me to another forum where i'm still waiting to be accepted, so i can see the post and plans.
I was wondering if anyone had any ideas for one. I have a small workshop and doing work in my free time, so i can't justify spending $3k+ on a commercial one just yet!