Canon on 'O Gott du frommer Gott'

At 6.12 on the YouTube video - The second (IIb) of two Chorale Preludes on 'O Gott du frommer Gott'. I have used the Blackburn Solo Hautbois 8' as the pedal canon with Positive flutes 8,4' and Great flutes 8,4' for the repeat of the first stanza of the chorale. Either Novello in the 1913 edition or Dame Ethel did not use this repeat. Maybe they were trying to save space but it only requires a repeat barline. It is used in the first setting (IIa) but written out and a second manual indicated. I have done the same with IIb.