I did mine 2 years ago. My cost was $485 for all 4 cylinders, I had about 250 hours on the cylinders and the cost was pro-rated against normal cylinder life. If I remember correctly, I also paid shipping to return my old cylinder.
Part of the saving was from a labor allowance that was included in the calculation to determine my final cost.
I have called them 3 times in the last couple of years and have pretty much been blown off. I have never been given the feeling that they care, want to help, or are interested in standing behind their product. I would love to hear if there is a different approach that might serve me better. Otherwise I am about to look at other cylinders.
Any ideas welcome here as well.......thx