What is the length of your stretched flaccid ? ( BP or non BP) Place the extender upright on a table and put a ruler through the noose/strap and basering to the table surface. Compress the extender - what is the length of the extender, from the table to where the noose goes through the front piece ? That should be similar to the length of your stretched flaccid, from the base to just behind the head.
When you have measured your stretched out flaccid, you have stretched all of your penis internal structures, and that should not suddenly become two inches longer when you’re attached to an extender. There is a limit, the one that we are trying to push by doing PE.
What kind of springs does your extender have ? A pair of 1500 grams/per pair, or those newer ones with double that or moore ? If the springs are strong and your penis are soft/stretchy, you wouldn’t get much reading of those notches, but you would certainly feel the force pulling. You say that the head is beeing pulled when you use too long rods, and that is my point of finding the correct length for the extender to your penis. It is fun to see that the extender is large, but it usually results in the head has taken the role as the hunged man ( the head been pulled off and choked to death). It is a struggle, but you just have to keep at it and find the right length for the extender, and grow with it slowly.
If you find it easier to write in sweedish, you could send me a pm, or post a thread in the scandinavian thread in the members only section on the forum. Good luck and feel free to ask.