How are you guys using the OD-3? As an overdrive or boost? I've always considered the SD-1 to be a boost that brings in the TS-type EQ which is great for leads. I've fallen in love with a Barber Gain Changer and let go of the CDD. The CDD will be replaced with an SD-1 for the purpose described above to boost the GC for leads. It works very well for this purpose.