I still haven't changed the fuse but may try that next.
My coupling caps are Audio Note Silver, I often wonder how V-Caps would sound, they are great in my cross overs.
My last re-tube consisted of NOS Telefunken diamond base E88CC (LV1, V2), NOS Sylvania 6U8A (V1, LV2), and Russian 6H23p-eb for the rest as recommended by Chris at the time.