Each year I purchase lots of the Aldi scratching posts and have found them to be good value until this year.
For some reason this years ones have screws working through and becoming unstable,this morning one of the pens had blood everywhere up the walls fortunately nothing more than a cut paw,this was due to a screw/nail type bit in top circle of the blue post working through,this particular one was put in by manufacturers.
The beige ones seem to be working loose at base of scratcher due to the wood/chipboard being poorer quality.
If you use these please check them daily.