This is the place.
If you have a question about how to go about writing a modified haikai, tag me with the @Kyllorac tag and I'll be happy to answer.
FAQ
Do I have to include a certain number of 5/7/5 or 7/7 stanzas?
Nope! So long as the first stanza is 5/7/5, the last stanza is 7/7, and there are 36 total lines, you can use as many (or as few) 5/7/5 or 7/7 stanzas as you like in whatever combinations work for you.
You will need at least two 5/7/5 stanzas though, because 3 is not an even number. ;P
If you're having trouble figuring out how to structure your modified haikai, here's a few suggestions:
Spoiler! :
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