FWIW I ordered an Obrien from Amazon 1 or 2 years ago. When It arrived I put the vinyl tube into the nylon “case” and filled it up. Something did not look right, so I took the tube insert out of the case to examine it. The tube that was supposed to be a circle was anything but. The tube was made out of a few strips that were welded together were cut all different sizes which made one side of the tube much larger than the other. I contacted customer service and attached pictures of the issue. They wanted me to take more pics, so I did. The CS rep said he could not see the issue and wanted me to send the tube in to them (on my dime) for inspection before they would send a replacement insert to me.
That was about the worst experience I have ever had from any company, I told him to pound sand and I would just send it back to amazon for free as being damaged and get my money back to buy a different brand.
2 years ago and it still pisses me off thinking about it…