I've got new silicone coolant lines from Z1 and am in the process of installing them, but have noticed the black factory spring steel clips are very very difficult to fit over the silicone hose and even then... pretty much impossible to get over the metal hard pipes afterwards. I've been looking for these same spring steel Nissan clamps in a larger size that will fit over the silicone hose. But they're proving difficult to find. My question is, should I bother going to the effort to find Nissan spring steel hose clamps or just use small worm drive clamps that may chew into the silicone hose? I asked if they had the Nissan clamps at a Nissan dealership only to be told "Don't use them they're crap".. which contradicts what I had originally thought.