Another question i have is this- when I would use my silistretcher, I'd notice that after removing the bell, only about half of my glans would show any signs of "vacuum pull", if that makes sense. Does that mean I need a larger size bell?
Makes perfect sense. I happens to me too. If your bell is either too big (where your glans partially slips out) or too small (where your glans barely fit half of itself inside), you get a sign where only half of your glans is or was under vacuum pressure. If the bell is too big, for me, I wrap base base of the glans with some TheraBand for friction and girth size filling purposes until I can "stuff" my glans into the bell without the accidental slip out. This is why we've been asking for smaller size fitments for the bell/cup.
If your bell/cup is too small, and you can barely squeeze your glans fully in, you need a more fitting bell. If it's a good size. make sure to turn the knob to retract as much of the internal lid far up as you can. Then twist the knob until the lid is only 1 full rotation from the top. Shove your glans in as far as you can, and ensure the glans remains perfectly inside the bell/cup, empty out as much air trapped between the bell/cup, glans, and the sleeve before turning the knob, then turn the knob to 1/2 to 3/4 rotation max. This will ensure your glans is fully inside the bell/cup at all time.