Thanks for the comments. The cap is indeed smooth...and is made from Aluminum. Given the force required to remove them, I wonder if the cap could even be warped on removal. I have no idea as to what tool PT uses to tighten the cap at the factory. I also find it amusing that PT makes its own hydraulic cylinders.
I think one of the main problems "may" be the use of different materials for the cap and cylinder (which is steel). As most know, this can create corrosion that almost welds the two parts together. I have a 48" pipe wrench so I guess we'll find out.