Jay recently got the new 4P Rollin´ hub and he will put it to the test!
Jay is (as most flatlanders, rightfully) really peculiar about his bike and he will share with you some insight of carbon rims and TPU tubes he got off from a site but not from a BMX shop.
Stuff from overseas is usually cheaper but you dont get any coverage or warranty so sometimes you need to buy twice. My personal opinion: try to shop local in your country first, ask for BMX parts or reach out to REAL BMX shops!