Hello, I went to replace the washer on the symmons flow control spindle. As no good deed goes unpunished, I ended up having to replace all parts from T4-through trim kit. Once installed I noticed I had little hot water. Came here, read and adjusted temp screw. All is well. Almost. The water pressure is low. It is as if the diverter valve/volume control is not opening all the way. However it is hitting the dome cover
In the correct spot I believe.
I am stuck. The only thing that is wrong now is the lowered pressure. Could it be the diverter valve volume control somehow? Your help is appreciated.

