Replacing with a separate section for filter_papers
- This will go back when/if filter_papers become tube-like

This reverts commit 0dbe1dcf93e26242d3e0a5000fb46b4149a98a02.
Add support for filter_paper transfers
Revert "Add support for filter_paper transfers"
- no longer used as we're going back to tube-like behaviour
This reverts commit 0d107ff75fc0eac5e9a90bf16402915eba8920f0.