There is a thread regarding safety in the Guinevere series. It touches on the issue of Mos-Fet overload or failure but there is no in depth discussion of how that would impact an amp; what damage could occur and what exactly would be the conditions under which a transistor might give out. It is my understanding that this is not such an issue with SS amps but with the high voltages used in thube plate circuits it can be much more damaging.
I am not afraid to use this circuit; witness the Guienevere I have and use; but at some point this should be addressed.However; I can't find any examples of failures or malfunctions by searching the net; so I guess they are pretty safe in use. I am sure if there were an event it would be written up somewhere on the net; so if there is I can't find it.
Better safe than sorry. Thats the only reason I asked.