On the X20, the AB5100s was not placed directly onto the transformers, like on the X12. The X12 had blue plastic cases covering it's smaller transformers. Those were more easily covered with the 5100s. The X20's transformers have a separate compartment that is much easier to treat as described on page 1. The Tanly is also treated with 5100S. It has a Talema transformer similar to those in the X12, so I applied it accordingly. No stabilant 22 was used on the Tanly. I leave the X20 and Tanly on all the time. The only piece that generates any real heat is the H10, so I will shut that one off. The H10 is given at least an hour of warm up time before I do any critical listening.