Both end caps are threaded Delrin, and newer IceCaps can be purchased and placed on with ease. They secure it with a smaller nylon thumb screw, but cracking is not an issue since they push on the Delrin portion. The light tube is threaded and secures into the base Delrin portion, and instead of the little cap that glued onto the top, they actually have threaded caps with a BN50 gasket to screw on them.
The base of the reservoir has two brass pins pressed into the Delrin. Each of the helix assemblies(Liquid Fusion), straight rod assemblies (RCX) and anti vortex assemblies (Reactor Core) has two small holes on the base that snaps into these pins. It allows the user to make these parts interchangeable.
Today i wanna show something different - as you know, i´m planing a review with an OC i7 920 @4Ghz CPU + 2x GTX 480, so i need POWER So, here it is, my new PSU: