came back to find my x-axis has totally failed and my project was trashed. called nexwave customer support and they recommended I try lubricating the rails and adding grease. I've always cleaned the rails and sprayed teflon on them, but not the grease. this hd500 is less than a year old, maybe 100 hours on it and I have another shark sd120 for several years now with well over 1000 hours on it. i never added grease to either machine. i went to add grease and found nextwave uses these silly 6mm hexagon zerks that don't fit a typical grease gun nozzle
pissed me off because now i'm looking at more down time waiting for that to arrive. but what pisses me off more was the nickel & dime bs nextwave is pulling, $40 for a zerk nozzle and some grease? spend $3000 on a cnc and they cant include the cheap little nozzle so you can perform proper maintenance on the product? 
i'm wondering if anyone has tried to remove and replace the hexagon zerks with regular round zerks?