Just ran a spool speed check, looks right to me:
[spool] progress=0.544 w_src/TOP=4.72 w_tk/BOTTOM=4.40 -> TOP faster
[spool] progress=0.544 w_src/TOP=4.72 w_tk/BOTTOM=4.40 -> TOP faster
then it evolves over time, idea is to be as close to accurate as possible:
[spool] progress=0.607 w_src/TOP=5.00 w_tk/BOTTOM=4.21 -> TOP faster
[spool] progress=0.607 w_src/TOP=5.00 w_tk/BOTTOM=4.21 -> TOP faster
If my research is right, the accurate cassette physics should be accurate.
