I love my Cafflano Kompresso (http://www.cafflano.com/product_kompresso.php?TM=2)
It makes a great espresso shot. Only challenge was when I would transfer the fine grind coffee to the basket filter, it would spill everywhere. So I made a funnel that fits perfectly within the basket filter. After filling up, carefully twist the funnel as I pull it out of the basket before tamping and extracting an excellent crema.
I printed mine out of PETG - .2mm layer height - 1mm wall thickness - 20% infill - no supports
If you make one as well - please share a picture and let us know what material you printed it out of.
I do have a design for a v2 that is a little smaller on the funnel side if folks are interested - just let me know and I can post it. Have not printed it because I haven't needed to.