Hello everyone. I'm due in a few weeks with my first child and I have no clue what I'm looking at when it comes to all the pieces of a breast pump and how they fit together. So I've ordered the Spectra s1. I've read that there is a common complaint about leaking/flimsy collection and that people just use other pieces of other brands to circumvent this issues. I'd like to have all the pieces I need before she arrives but I have no clue EXACTLY which pieces I need. Anyone out there with experience with this pump, please let me know what I need to get to convert the collection pieces of a spectra to say a medella collection, please let me know. Thank you!