Online custom computers. Aus. | RF Modulator

[Felino]

Were can I find a website that has an online order form for custom computers, hopefuly in $AU that I can use a a price refrence, like a sort of guide?

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Also, this doesn't really need a new topic, but can I use / mod a video RF modulator to use as a short range video transmittler?

Thanks.

-Fel