grapevine build

[scotheath]

I have already ordered the PC board for the grapevine build and in the process of ordering parts from Tayda but there are 2 caps unavailable I believe off top of my head the 2 I cant get are a couple 50n and 33n, they do have caps close in value  I think 47n and 56n and 27n and 36n I think, from what I've read its ok to go up but not down. if that's the case what if any difference will it make to the sound ? any ?
thanks
Scot