NOTE: See the examples with music notation below.
"In an additional practice step, I would recommend that you play the left hand (measures 3-4), and only add the notes 1 and 3 (in one quarter) of the right hand. Notice that the second sixteenth of the right hand is exactly between the notes 3 and 4 of the left hand (as you said).
In another step, I recommend to add the note 4 (in one quarter) of the right hand (measures 5-6). This note should be just a little bit before the 5th note of the left hand (as you said). Then, in the last step before putting all together, play the notes 1 to 3 in the right hand (measures 7-8).
Notice that the second note is just a little bit behind the second note of the left hand (as you said). Put all together (and all the same with reversed voices). I think these extra steps in practising are helpful when dealing with these complicated rhythms."
I tried Maik's recommendations this morning and they really work. The whole thing together is very easy and pleasant after such preparatory steps. Try these tips in your practice and let me know if they have been helpful to you.