2.2 crawler foams

here is my take on printed foams for 2.2 comp crawlers. been using them for over 2 years they work well and shed water.
I included a picture of a 2 year old one and a new one.

how to print them.
I use Cura for my slicer.
use Gyroid infill
print 0 walls and 0 top and bottoms
no supports
the inner foams I do somewhere in the range of 8-10% infill
the outers I do somewhere in the 3-5% infill (3% is really soft).
I use SainSmart TPU filament.
I over extrude the filament about 4-5% to help the single lines to keep stuck together. so if you normally run your TPU filament extrusion at 120% I would run it at 125%
having a dilled in printer for TPU is key here.
biggest thing is first layer adhesion, you only have a few lines for that first layer so getting them to stick is key. I do a brim on both inside and outside with at least 5 lines each. you get that first layer you should be good,
getting the prints to look good is hard. since there is only single lines and most of them