Pedals that stack with the Electro-Harmonix Steel Leather Attack Expander

Catalinbread SFT

Run Catalinbread SFT after it and the bright edge settles into something more warm

One Control Lingonberry Overdrive

One Control Lingonberry Overdrive leans warm right where the bright tone needs it

FoxGear EchoSex

Run FoxGear EchoSex after Electro-Harmonix Steel Leather Attack Expander in the signal chain, clear of Electro-Harmonix Steel Leather Attack Expander's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Line 6 DL4 Delay Modeler

Keep Electro-Harmonix Steel Leather Attack Expander's aggressive voice out front: Line 6 DL4 Delay Modeler goes after Electro-Harmonix Steel Leather Attack Expander in the signal chain so its warm voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)