what slicer are you using ?

To be fair I get a lot less stringing on my delta than on the makerbot clones.

My retraction settings are 1.8mm and 60mm/s speed.
I get zero stringing between multiple parts, and almost non within a print.

You definitely look like you've got massive over extrusion going on there.
Your print speed is really slow, I've defaulted to between 75-100mm/s for pla on mine. Once I've got a print cooling duct in place I'll see just how fast i can print pla. Can't see 150mm/s being out of reach :-)

Have you checked you nozzle size ?
Most delta kits seem to come with multiple sizes. I'm using the 0.5.
Have you measured the diameter of extruded filament ?

Also have you got a ptfe tube in the hotend, between the top of the nozzle and where the filament guide tube ends. If there's a gap and it's pushing through a 'pool' of melted pla, that could also give you irregular extrusion.
Mine wouldn't extrude for more than a couple minutes before I added the tube. She hasn't looked back since.