Nice mod, filtering is good, and even better if it's done in one single entity.

I just installed it on my save. It seems to work just fine, but I cannot pick it up from the ground. I can remove it, but it won't appear on my inventory.

And more. When I put it on the ground, it has only 20 signal slots. To increase the number of signal slots, I need to fill it, close it and reopen it, so I can have more signal slots.

I never noticed that, but then again I wasn't paying attention as a lost Combinator is not a big deal where I am at. Thanks for the report, will look into that.
As for the limited slots, yes that is by design. I chose 20 kind of arbitrarily because it fits nicely into the UI without producing a scrollbar and I figured most people don't filter more than 20 signals. Originally there were a lot of slots, however that seems to cause a slight delay especially on servers. I guess I might make that an option for how many empty slots there will be by default.

I use about 30 filters now, I use all of those to calculate what I need to ship to different surfaces on SE. Either way, I set up a requesting signal, and filtering by another wire saves a lot of work. I only filter for debugging. It's easy to understand what I need and what I have in excess.

No idea how that ever happened, However it is fixed with 1.0.2.
Thanks again for the help.

There is now also a startup setting, allowing you to change the number of empty slots when you open the UI.