+1..... I have a pair of Tube Fantasy's too and would be interested in any mods to improve the performance. I'm a new owner and don't have many hours on them. A pair of GL300B's are due to arrive today to replace the previous defective ones. I'm using Telefunken EF86, Phillips NOS 12au7 and Mullard GZ34 to complete the tube complement. I'm bi-amping my speakers.