1. put the chain on the ring and smallest cog, then see where the chain meets and add 4 links (maybe it was pins). Compared to what I have, that would be removing quite some length.
2. same as above but take the chain through the derailleur and pull it together just a bit, adding tension to the chain. For me that would mean adding some length.
Here is what it looks like now with a 11-32 cassette, which is what I will have on my race wheels. Thoughts?