Frank,
I don't want to bust your bubble, But Tachus42 chopper adapter was meant to work with the discrete board. You might want to pm him and ask, as I recall somebody else asked if it would work with the 5804 and I believe he said no because of the clamping diodes. Regardless, the real speed up is power supply voltage and yes a chopped current limiting circuit puts on the afterburner. There are other current limiting techniques also other than resistors.
Phil |