I’m having a bear of a time installing the aluminum flanges with the double radial O-rings into the 2" acrylic tube from the watertight enclosures kit. The first O-ring goes in relatively easily, possibly because at this point the flange can go in at a slight angle. I haven’t yet been able to get the second O-ring to go in on either side – can’t get it past the tube lip. I’ve put about 120lbs on it, which started to feel wrong, so I figured I’d go to the forum.
Are there any installation tips for this step? The O-rings are both lubed. Thanks!