yes the lines around the hole for the bolts was rounded.
i've found a mistake. the outlines from the centerwheel should be rounded.
this could be a really tricky place to clean ist. :-)

Yeah you had to pointed out even for me to see it, didn't the first time. Still this is a better wheel there.

A new update, started from scratch. (yep that is me changing my mind to often, crazy stuff in there too :P)

Update