I use Rectus 21, and have frequent problems with the female end sticking. Frustrating as hell.
Yet another piece of WFP equipment that is not designed for the job, yet adapted as a "make do".
Someone needs to develop WFP equipment from scratch, with WFP in mind, not "oh that will fit, and that will do for a while" approach. I am really astounded at the lack of quality in the equipment we are forced to pay a premium for.
Rant over.
Or is it?!