Hi Rambone,
I guess it depends on how long you have been using PM traction and how tough (plastic-dominant) your tissues are. In my case, I just finished the breakin period as outlined in the user’s manual (I have an AndroPenis, somewhat similar to the PM you have). So far, I have logged just about 150 Hours and, in combination with pumping and heat I am starting to get some gains. Here’s what I have observed as far as tension is concerned:
Right up to the end of the breakin period, I was compressing the springs about 50-60%. The breakin period was structured to gradually increase the spring compression over time so as a person ‘toughened’ up, more and more tension was applied. Initially, I was able to use the noose-like grip of the Andro without too much problem by wrapping the corona with J&J gauze and Therawrap.
That said, when I added the next set of extender bars after the breakin period the spring tension became enough for the silicon rubber noose to irritate the glans - so, I modified the Andro connection mechanism by replacing the noose with a miniature Captain’s Wench and it is working just fine.
Right now I have compressed the tension springs about 75% and I feel a good stretch on my unit using the Captain’s Wench. However, the wench clamps down on the shaft about 1 inch in back of the glans (on the sides of the shaft) so there is a bit less tissue to distribute the stress over than with the noose but the overall arrangement is more comfortable at the higher tensions I am now facing. However, there are two factors (for me) that affect tension beyond just the length of the extender bars: 1) Pumping and 2) Heat.
I just started pumping after the breakin period on the Andro unit. The idea is to use stretching and heat to help seal in any gains from pumping plus pick up additional gains from traction. The wild card in all of this is heat - it helps significantly both during pumping and in traction. I notice that especially right after pumping when I am ‘bulked’ up, when i get into traction the stretch is really very strong (significant tugback). Using a heated ‘rice’ sock drops the stress and makes it (the stretch) quite doable. The same is true right after adding an extension to the bars - heat helps.
In your case, if you have been using the PM a long time say 500 hrs or so, then maybe you should be close to 90% compression. I think the springs are set such that 20% compression is 300 grams and full compression at 100% is 1500 grams. At 453.6 grams/lb 1500 grams is ~3.3 lbs force. Compared to what hangers use, that is a moderate force.
Here’s one caveat - I personally would not want to be ‘locked down’ at 100% on the springs with no give what-so-ever. You need a little bit of shock absorber (spring action) to soften any sudden moves during your normal course of moving around so as not to bruise at the base of the PM. Also, having a bit of spring left allows you to perform ‘Kegels’ against the springs which is terrific all the way around for building strength.
In terms of tolerance, at 75% compression I typically go at least an hour without heat and up to 2 hours with heat before I bail out and unwrap. Any constriction on circulation I experience now using the wench is caused by wrapping too tight, not by the wench. If I wrap just right, at the end of a 2 hr heated session there is no major discomfort or discoloration. Without heat, the end of my unit is many times just slightly cool to the touch as I unwrap and full heat is nearly instantaneous as I take a break and lightly massage.
Using a schedule like 1 hr in, 1/2 hr out or so, I am averaging 6-7 hrs a day in traction spaced around my pumping sessions. By the time I get up to 500 hrs or so, I expect to be 90% on the springs but I do not expect to go over that.
If you get to the point that your unit is toughened up to where maximum tension produces no gains, you might want to consider heat if you are not already using it. I have measured the inner temperature of my ‘rice’ sock so i know exactly how long I need to nuke it in the microwave to get the right temperature. I estimate that a sock temperature of 120 deg F gives me an inner tissue temperature of about 112 deg F and the sock holds enough heat to last about an hour.
Heat is giving me much faster initial gains than the average rate of gain published on the Andro website. If I can keep up my current pace, I expect to reach my goals in less time and at less overall tension (and discomfort) because of using heat. Of course, each of us is unique in our physiology. What works for one may not work for another - yet again . . .
I hope this helps,
MrTiPS