Let me preface this by stating that I am new to the laser 4000. Your responses will probably take some time for me to completely understand. If I adjust the tri-foam to an accepatable level (about 150 p.s.i) my presoak skyrockets to 300 p.s.i. If I adjust the regulator back to 190 p.s.i. for presoak, my tri-foam does not work. Have any of you experienced this?