Didn't I read somewhere on this site that DaVita bought a small percent of NxStage?
I have found a "fix" for the kinked small lines, I take the cover that is on the "spike" and using a sharp box cutter, cut off the closed end and the ring on the other, then being VERY careful split it down one side, it slips over the damaged line and then can be taped over to fix the kink, solved several alarms I have had until they get their quality control in order......