Hi, I have some Ixos Gamma speaker cable.The core is 4.2mm but banana plugs can generally only take 4mm. So my question is "are there any banana plugs that i can use that'll take 4.2mm?" I was looking at these: http://www.tvcables.co.uk/cgi-bin/tvcables/PGA8103.html , but looking around on the specs differ from bewteen 4mm-10mm! Any advice? Oh, value is quite important as i cant get afford too much!! Cheers!