Hi again,I don't do Jazz....But I hope this can help you outhttps://en.wikipedia.org/wiki/Coltrane_changesBest I can do.Natsu
what set 'giant steps' apart, when coltrane and the peerless tommy flanagan worked out its changes approximately sixty years ago, were its modulations, based on a symmetric division of the octave, rather than the conventional asymmetric 'changes' in jazz previous to it (use of the dominant and subdominant). specifically in 'giant steps', the modulations progress through ascending or descending major thirds.if you can solo over the 'giant steps' changes you are far, far ahead of me, and my study of 'trane's musik and attempts to play bits of it go back four plus decades. you might enjoy flanagan's trio renditions (geo. mraz, al foster) from his '72 tribute album also titled 'giant steps'.
Maybe it's my classical background, but once I got the chord changes in my LH it wasn't hard to create lines based off of them; the chords form quite well around themselves, which, as I found out from you, is because they're based symmetrically.