Hello Paul,
I used to work at Virtual Dynamics, and thought I might actually be able to help you out. I have the McCormack DNA 225 Platinum plus (stealth caps, transformer+, carbon transformer base) upgrade. Wonderful sounding amp, and it first came with the HiFi fuses, as they accidently shipped it before receiving the Furutechs. Rick is a big fan of magnets, and on his Luminance amp replaced his fuses with them, so I likewise did with my McCormack (which is why the amp ended up at SMC in the first place!). I say this to say that the improvement that the magnets made, partially as a solid conductor would make a good improvement, the Furutech fuse made just as much. I highly encourage this upgrade, and it is safe!
I used to work at Virtual Dynamics, and thought I might actually be able to help you out. I have the McCormack DNA 225 Platinum plus (stealth caps, transformer+, carbon transformer base) upgrade. Wonderful sounding amp, and it first came with the HiFi fuses, as they accidently shipped it before receiving the Furutechs. Rick is a big fan of magnets, and on his Luminance amp replaced his fuses with them, so I likewise did with my McCormack (which is why the amp ended up at SMC in the first place!). I say this to say that the improvement that the magnets made, partially as a solid conductor would make a good improvement, the Furutech fuse made just as much. I highly encourage this upgrade, and it is safe!