The transformers in question have been discontinued for years now, and yes, with the wrapping we were able to make even them hum.
However, we can also drop in the German mymetal piece which is awesome. As for the amps, no need whatsoever, only old Tempests.
Finally, as for the unit itself, keep in mind that the Tempest is the 5 K Symphonic Line RG 2 unit. Granted, the new ones are so far removed from older pieces due to the upgrades from Germany, but that doesn't mean that even some of the first pieces kick ass.
Of course, as always, system synergy....
Late,
Klaus