Wer nur den lieben Gott lässt walten

Carl Philipp Emanuel Bach, the son of Johann Sebastian Bach, wrote many keyboard works and some organ works. His organ sonatas are well known. In my digital sheet music archives I found this setting on the hymn 'Wer nur den lieben Gott lässt walten'. I couldn't find the source of the piece, I probably found it in the free domain years ago. At first glance it was very 'J.S. Bach' like, but different. Maybe an hommage of C.P.E. to J.S.?

I tried several ways to play this piece. Only manual, one manual & pedal, cantus firmus on a second manual (which didn't work, because of the big stretches for my left hand). The tempo was also an issue. Fast or slow, both possible. That's the fun with lesser known pieces, you can go different ways without foreknowledge.