are the 8 mm elements BOSCH or after market?
In case of after market you will not be successful with the set up.
At least all after market elements I have seen are far beyond tolerance which makes it impossible to set up the pump especially when we talk about making things better than stock.
In case you want a single tuned MW for your own use, get in contact with David (Dervtuning) on the other side for the set up, I have the elements 6.5mm diameter.

Tom