I have to try Secretas&Frozeta first and see how spaceship scrap recycling work, I'm pretty much still enjoying original planets. I'll look into it on the weekend, but if it's just a matter of output slots number then you can do it yourself, follow these steps:
1. Open the mod zip folder, in your mods folder of course.
2. Navigate to prototypes subfolder, then open the file "dbm-machines.lua" (using notepad or any IDE).
3. Ctrl+F and find this base = "recycler", then add this line right below it result_inventory_size = 40, don't forget the " , "
4. Save it and open the game to test it if it work.
I'll look at it on the weekend, if it's something major that need an update then I'll do it, other than that I think add one line code above should do the trick.
Good luck!