First things first- I have been pumping for over ten years and have seen pump fads come and go. I got into two stage pumping three years ago, and thought that my two stage cylinder did a good job, and just dealt with ‘the pinch’. When it broke, I decided to deep dive cylinders and I am still amazed at the amount of good information on forums and other sites I found! The pumping community is diverse and it has something for everyone. The community consensus for two stage pumping products is the BullMaster series from pumptoys, from engineering to comfort to quality and even aesthetics they are on top. I ordered the BullMaster 357 with silicon seal and a jar of Glyde lube. This beauty is unbelievable. Truly amazing.... when I unboxed it, I felt as if I was holding the Holy Grail of cylinders. I shit you not everyone... from the design, manufacturing and overall quality the 357 is in a league of its own... the fit, form and function of the 357 could not be better. I will be more than happy to answer any and all questions you have- ask away or DM me. check out this unit! Awesome.