Ok thanks.

> I've read that the best thing to do on the mixdown is to use the EQ as
> little as possible, or at least avoid boosting frequencies, that it
> causes unwanted distortion. Any remarks on this

The basic rule for an EQ is that a little goes a long way.

Whereas recording and mixdown can use huge amounts of EQ (like 10db or whatever), mastering is usually thought of in tenths of a db and at most, going 2 to 3 db. There might be a lot of EQ used, but it's all up and down the frequency range and usually in .5 to 1db amounts.