Red Llama 330uF cap - less OK?

[dachshund]

C6 is 330uF. Is a smaller value OK? Like 220uF or 100uF?
http://aronnelson.com/gallery/album77/Red_Llama_LAYOUT_perf_002
It seems like it's the power supply cap, so I was wondering why it's such a high value and if that's necessary.
Thanks in advance. I did a search, but couldn't find this exact information.

[markm]

I received the info from Mr. Huge himself that the 330uF could be subbed with say, a 220uF without any difference in the circuit.
It's filtering for the P/S.

[Hanglow]

I used a 220u I think, works fine