I actually use mine quite a bit. The ideal cyl would be a 5" stroke. I could not find one, so that left me with a 4" or 6". I didn't feel a 4" would give me enough adj. so I ordered a 6" from Surplus Center. To get a 6" cyl to fit when retracted, I needed to order the cyl with a 1/2" rod.
https://www.surpluscenter.com/item.asp?UID=2156122620360416&item=9-1649-06&catname= The problem with the 6" stoke is the fully extended it is too long. I went around and around on the best way to get the 6" cyl to fit. It was discussed on TBN in another thread. I thought of putting a chain to limit the stoke, I also considered cutting off the tie rod end and then cutting an inch off the rod and welding the tie rod end back on. Neither of those ideas was real easy for me since I don't weld and the chain I would have needed to use was really too big to get it to work. So the easies thing for me to do way lengthen the actuator to accommodate the longer cyl. I use existing holes, and made bushings where ever I could and drilled new holes where I had too. It was necessary to make an angled actuator to get the cyl to travel through it's complete throw without binding. When all said and done, it may look a little funny, but it works wonderfully.