When you have as many rolls of filament as I do, you need a good place to keep them. I present to you Pergo's " !--> Wife Approved <--! " filament rack! Print at .4 mm with 10%-15% fill and 5 shells/ 5 top/5 bottom. These are pretty strong at this setting. PLA or ABS. WITH SUPPORTS All 1/2" schedule 40 PVC pipes lengths are 5", 10.5", or 26" I drill a hole and then put one screw in that hole to hold it all together. Make sure you rotate the pipes so that the ugly writing is facing where it will be agait the wall or towards the floor. This is a really great PVC pipe cutter! I've cut so many pipes with it and it is still going strong.