No, I didn't ask for samples and they didn't send any. I am using chemionics medium plastic. Same problem with MF and Spike It. Not sure exactly what temp (can't keep a thermometer working) but it's just hot enough to shoot. I have tried many many different temps. I have also tried slow injecting. Not much I haven't tried. I had the vents machined to two thousandths deep, they are not leaving a tag end. Also opened one side of gate and area leading to gates. Anyone have a suggestion for a good temp gauge or thermometer ?