It won't due much in your DSL. They're made to replace V2 in non-master volume style amps, and some master volume amps like the JCM 800. There's a list of "approved" amps Soldano put out...but its probably not all inclusive.
The hot mod contains some soldano circuitry which adds gain to the V2 position. Do a google seach and you'll get all you need...
A proper bias and some new tubes will take your DSl light years past a hot mod.
I've got one as well...great for what they are...adding gain to an amp that is lacking...like the older marshalls.