Sadaharu: A few variations missing for the E18 variation. For example, cut first at C18 should also work. G18 followed by the cut at C18 should also work.After C18A17 should be able to be played immediately etc.
posetcay: Can you write the exact sequence? THe solution tree for this one is very complicated, so it is hard to understand which sequence is talked about unless the whole sequence is given.
Sadaharu: Too many "how about this" I feel.
Also, some moves such as the T3 throw-in first for the N2 or M5 variation or K5 first for the P2 variation are also possible
posetcay: Ok, reduced the number of branches to 3 from 4. I think the remaining three are different enough to be worth keeping. As for the T3 throw-in, I don't think it works if black throws in before cutting at R2, you can provide the whole sequence so that it becomes more clear.
Your moves have been added.