Seal

General question:

Is there anything wrong with using a pump seal.

Im using that Universal pump seal replacement and it works really well. I can never stay consistent with pumping (without the seal) because it takes a long while to get and worse keep a seal and then it takes very long to pull off a good session plus very messy and uncomfortable.

What I have noticed with the seal though is that the pressure is different. 5 mmHg without the seal is probably equal to 7 mmHg with the seal - at least in terms of expansion. Also definitely will limit the girth expansion at the base.

Thoughts?

I use a selfmade seal that also adjusts for angle.

I love it and it makes pumping easier to do.

I thought about a seal that slightly constricts at the base. It would add a bit of clamping effect.

It has to be narrow though. If the seal is sucked too much into the pump I think it is not good for expansion of the base.

Any high quality seal recommendations?