Hey Greeny, I may have a solution for you for your ice cube problems. The problem is with the K5 units itself, not that it is a faulty unit, just a part of how they opporate. How the K5 works is that instead of using an air charged tank for the reservoir it uses a water on water tank. This tank in essence fills a bladder in the centre with RO water ready to be used and pumps pre-filtered water from the supply line in around the bladder to squeeze it out. as a result if you have 60psi for the home, you have around 60psi for the RO. What can happen is that if it is a long run to the faucet or if it is going down to a 1/4" line, the high pressure output can cause pulsing. Because of this pulsing your ice maker may not be operating properly. All that needs to be done is you need to call your Kinetico dealer and ask to them to get a K5 flow suppressor valve (part# 14585) to be installed on the line from the k5 unit to the outer bladder of the WoW tank. This valve can be fine tuned to eliminate or at least drastically reduce the pulsing, which should fix your ice maker issues.