FYI, I doubled the single-ended output voltage of my DS with a mod to the output transformer circuitry that re-purposed the balanced output. (And to head off any flames, I’d just like to note that I love the design philosophy behind the DS and have no intention of ever selling mine, but wanted higher output so I could forgo a preamp. I’m also into DIY single-ended tube amps and have no use for the balanced output.)
I’m not encouraging anyone to try this given that it’s a tricky mod, but basically it went as follows: I lifted the two taps of the transformer secondaries from ground and tied them together; jumped the output resistors on the -ve balanced side, which then became the signal ground; and rewired my single-ended interconnects with XLRs at the source end, with +ve being signal and -ve as ground and plugged them into what had been the balanced outputs.
On top of the increased output, a possible advantage to this mod is that the output signal ground is now isolated from the DS ground and the digital noise it carries, although there will be some capacitive coupling. It also provided a surprising increase in dynamics.
On the downside, the 20db attenuator no longer works properly but that is not an issue for me. (Will address this if I need to. The mute works just fine.) The output impedance is also slightly higher, but I have no intention of reversing the mod.