The 8R5 requires lowercase characters, so don't plug it in until you've got lower case working. The Dick Smith board has an eprom containing 128 characters. The other 128 are simply reverse-video equivalents, and the other chips perform that function. The El Grafix is 256 unique characters, which mean a bigger eprom but the number of support chips is reduced. In my computer, you saw a special one-off, because by then the Dick Smith kit was no longer available. I'm not sure but I think it has the 128 normal characters and 128 reversed characters as if it was like the El Grafix. The Dick Smith kit plugged into 3 existing chip sockets which as you know will eventually damage them. It's better to just hard-wire something as it will be far more reliable. Whether you choose the Dick Smith or El Grafix set is up to you, as is the way you implement it. On my non-working Super-80, I have both eproms wired up, with a switch to choose which one I want to use.