There's actually a trestle with a top bar. I got a pair in Dublin last year. Here : https://goo.gl/c8hAoB https://goo.gl/c8hAoB The pinewood trestle near the t

There's actually a trestle with a top bar. I got a pair in Dublin last year. Here : https://goo.gl/c8hAoB https://goo.gl/c8hAoB The pinewood trestle near the top. You can see the adjustable height work table with dowel pins. http://www.ikea.com/us/en/catalog/products/00225293/ http://www.ikea.com/us/en/catalog/products/00225293/ Yeah, it seems that's the max height. From there, improvization. ( Your weakness, is not your technique. )