I have read a few comments about the two small pieces that are inside the slot of the KNK-Force.
As already mentioned before, there is a good chance that those were for the mat alignment tools (as it is with the KNK Zing), but the KNK Force comes without them.
Well, here is an idea to crate some alignment tools that can fit inside the Force.
Fortunately, I don't have skewing issues. At least for now.
But I hope that this ideia can help some one that have this issue.