I also made a square with 4 bullion buttonhole stitches in perle 5.
Then I didn’t had time to stitch for a few days, but yesterday the stitching bug bit me! I made a lot of bullion buttonhole stitches with perle 5 and this variation is one of them. I made a combination of the crossed buttonhole stitch and the bullion buttonhole. The stitches are much longer (9-12 wraps).