I think Dave meant to link this document by K9YC - .
It¡¯s the one where he compares a number of different types (#43, #61, #73, #78, etc) and why he often prefers #31.
But he has good things to say about #43 as well!
Also #61 and #73 in some circumstances.
See also
for "The Measurement Setup For Chokes"
and "Winding Guidelines".
Oristo