Hello Baker, I have been using Microstar HS for the last several months with great success. I use it with all my alloys plus pressing techniques with absolutley no problems. I also use ringless, which I have done for over twenty five years. I will say that any investment you use you will need to adjust the water to liquid ratio for each type of alloy or pressing type. But saying this I have found the Microstar to be the most accurate once you get your ratios dialed in. The chart that is sent with the investment is VERY close. I also check all my castings under forty power magnification and I am not seeing a problem. One thing I also want to mention is a lot of manufactors are having trouble with getting a consistent quality of base material that goes into investment. This is a by product of the plaster board industry, sheet rock. The reason I mention this is I have been running into problems with other investment breaking or blowing up in the burn out furnace. Man what a waste this can be!! I have used several investments and the Microstar is the only one I have not had this problem with. Good Luck, Byron
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