Ctc 4000
I have been using the ctc 4000 for awhile. If you are just starting with the pump, I would increase the factory program by 1hg of pressure at each interval to see how you it feels. Work up gradually. Don’t exceed 7hg for 5 seconds.
In my current routine, I start out with 6hg of pressure for 5 seconds to start off with a good pull, then drop back on the pressure from there. I would not recommend going above 7 hg for 5 seconds. My low settings are in the 3-4 hg range. The alternating settings in the step routine will feel great and help you pack the tube efficiently. I am currently using a CTC cylinder for penis pumping and it works okay. I think it is a solid cylinder but the vacutech seal up better.
I also use a vacutech two stage cylinder for full package pumping with the CTC pump. I stay in the 3hg to 4 hg range and occasionally step down to 2.5 hg. This feels great and you will get a great pump. Pumping your balls will also make you quite horny and your balls will hang lower after a few weeks which in my opinion makes the whole package look bigger. You need to work up to 45 minutes with full package pumping.
Hope this helps.