should I soak?

Hi.

I'm making a bread with flax in. 

60% WW

40% T65

83% H20 (this is counting  added water for seeds)

2% flax seeds

I added the flax in the flour, then mix etc. ;)

It's in the fridge for bulk now.

My questions are:

I'd like to add more flax seeds to the outside.

How is this done? Before final proof or after? Should I soak the seeds? How long? In what proportion to water?

By MiniOven's suggestion in this post  I didn't pre soak the seeds, just added the water (1:1.5)* to total water.

The dough is feeling a little dry I think... Easy to work so far.

Thanks!

*I got this number from this table:

http://www.homebaking.at/quellen-und-quellen-lassen/

using google translator

 Thanks!