This is the kit that I'm using in my travels and in the office, complementing the pack composed by Outin Nano, the large basket and the case.
I'm adding:
A portable stand, the thinnest possible, so that it can fit in the net compartment without compressing your Outin Nano or stretching the case. The stand is stable, rigid, can fit my pocket scale and even the larger one in the picture, which is a Tiny2s, about 10cm x 10 cm x 2 cm.
Shower ring extractor: to easily remove the shower screen when it's still too hot externally and with very hot water trapped inside the basket.
A knock tool to 1 - avoid getting burned holding the hot metalic basket, and 2 - to remove the puck more easily when you have limited space and cannot wait for the basket to cool down. You can also use a spoon and the open version of the knock tool. PS: the 3mf includes only the closed version, which I think it's more useful, but if you prefer the open version, just add the stl to the plate.
A support for the funel and tamper included in the large basket kit, plus the shower screen extractor and the knock tool, so that you can still fit a WDT and some beans under this support.
Then, I'm taking a hand grinder, a scale and a small towel to the office or trips and always having a home barista level espresso.
You can print all the parts in PLA, even the shower screen extractor and the knock tool. The contact time is very short and I didn't have any issue.
The support can be printed in TPU as well. The advantage is that it won't scratch your funel and tamper, but it's more flexible if you don't print with higher infill percentages (maybe 30% will be sufficient, I used 20% and it was still a bit soft). In PLA it's easier to print, the filament is cheaper, is more rigid and better to keep the accessories in position, but may scratch your funel and tamper (you can always use a small and thin cloth to protect it).
If you want to know how to make better coffee with Outin Nano and my 3D models in real use, check this video: