I have used Tokoyama for thelower and ufigel for the upper for late stafge relines and temporary relines...Ufigel is still in service after one year,,,Easysoft I have done all needed replacement due to bubbling and porosity post insertion....all replaced with molloplast...I have been using coesoft as a temporary fix and coe comfort as a functional impression material...as well as tissue conditioner.....with good success. The Coe soft is really good to taek a reline impression too. a half pound kit for 245 is not too bad andlast me about thirty soft linings, impressions so thats not too bead for the quality we get from it. I have really been wanting to try Hydrocast but not certain what precautions to take at the lab.