I did try that, it did not help.
Striping drives 1,2,3 gave me 96 MB/s
then Striping drives 2,3, 4 gave me 98 MB/s
I really have no idea why this is not working, puzzling.
Each individual drive gives me in the mid 40 MB/s no problem, together, I do not get the approx 200 MB/s I should.