I bought a 8ohm/15w Tube Juice Attenuator (which I think have been discontinued) and I've been using it with my 4w Vox AC4TV...and it's been OK-ish, not great sound when you dial it up. However, I suddenly realised that the Vox is 16ohm I should be really using a higher rated attenuator. (btw I understand that the AC4TV can be used with a 8ohm load, so this may all be for nothing) I've bought a 16ohm/100w L-Pad - is it just a matter of swapping the L-Pads? I can see two 'things' - this should give you an idea of my electronics know-how - stuck to the enclosure with the numbers '4' handwritten on them, which I think are big resistors. Do I need to upgrade those too? Also, I'm going to add a brightness switch switching between a: 6.8uf 50V Alcap Bipolar Axial Electrolytic Capacitor ...and a... 2.2uf 100V Alcap Bipolar Axial Electrolytic Capacitor ...but I'm a bit concerned about the 50v/100v disparity - is it ok to use them?