[ariadne]

There's an important job to do with these pumps - which is to get the correct diameter of "flange" (breastshield) which suits your nipple.   You need the nipple to be drawn into the tube, and if your nipple is narrow(ish) then the standard flange is too wide.   Theres a company called Maymom which makes Spectra compatible flanges.  Here's a link to a 17mm flange which is much smaller than the standard 24mm and may fit you better https://www.amazon.co.uk/Piece-Breast-Shield-Flange-XX-Small/dp/B074Q6N23Y/

You are right, in the past I used to pump full force and I may say the original 24mm was considerably hurting my breasts, with marks sometimes staying until the next day. It can't be, babies don't suck that way.
Since I reduced a lot pumping power, I guess the size of the flanges is less important.
I'm very interested in the Annabella system from PepermintPatty, I really would like to try but it is working with batteries and I'm afraid to have an expensive low quality pump. Besides I have to buy two, it will be a lot of money, I can't imagine pump one breast, than the other
 
https://www.indiegogo.com/projects/the-ultimate-breast-pump-annabella#/

The Maymon flanges are not expensive and could make all the difference to making progress with the Spectra - when the nipple gets pulled into the tube properly, it grows (with time of course)