I buy good stuff, I buy cheap stuff. As a result of some (not all) cheap stuff purchases, I end up with spare, broken parts. Occasionally the strategy pays off & I come up with an idea that actually works pretty well. Here it is, my magfloat/broken scraper frankencleaner thingy. I have an unmodified mag float that I use most of the time, this thing is used every so often & works very well in the corners!
So, yeah, I think I can take a pass on the Tunze thingy for the time being.