RWC

I am having a terrible time with blisters and holes in my horizontal surfaces. See first attachment. I have been struggling with this for a week or so. I have added top layers, increased temp, lowered temp, increased extruder % output. Anything I could think of or find on line. I have come to the conclusion it is the garbage I am getting for infill. See second attachment. I am a newbie so I am betting some of you more experienced folks have seen this before and can point me in the right direction Thanks Rich

I am using Cura 3.6.0 with a Geeetech A10M. Dual extruders single hot end. When I cut with Cura using extruder #1 life is good. But if I cut with extruder #2, the skirt will print from extruder #1 at 205 deg. Near the end of the skirt temp shifts to 190deg, the end print temp. At the completion of the skirt the temp turns off, the head goes to the purge position (no purge block in the cut) returns to print location and prints with extruder #2 until too cool to extrude. I can with in the machine’s firmware mix colors as long as I cut with #1 not #2. I am a newbie and the 100s of settings in Cura have me baffled. Any suggestions as to where to start. Thanks Rich