Meffert's 4x4 broken!

[Slash]

Hi,
I have a question. I bought my meffert's 4x4 in July, and since that time 1 corner and two centers broke(one of the centers broke during my previous BLD attempt). I glued the corner and changed the center with an other one, but I'd like to know why are the pieces brake quite easily? I really take care about this cube, avoid dropping it etc. I don't really get why the store-bought super glue(costs half a dollar=100 HUF) keeps the pieces together better than the factory glue(I know it is not glue, but I'm not professional enough in English to be able to speak about "How It's Made").
The biggest problem is that I have two days until the Hungarian Open, and I don't want my cube brake during BLD.

 

[Jake Gouldon]

Are you forcing it when it locks? That may be the problem.

 

[iSpinz]

Tip: Dont try to cut center's.

 

[Deleted member 4527]

This is what I got when I emailed Mefferts a while ago when i broke my corner piece

This enherent weakness has always been there since 1981, it is a great puzzle for speed cubing but the spacelimitations do not allow for some of these connectors in the center and corner pieces to be strengthened any further. However our puzzles are fully guaranteed to please so spread that along to newcomers to the puzzlers community. Let us know which color tiles the piece has and we will send you a Free replacement from Hong Kong immidiatly by Airparcel post.

 

[jonny guitar]

My 2 Mefferts are the only two 4x4's that I have owned that haven't broken; original Rubiks, retooled rubiks, eastsheen all broke in short order (eastsheen just became so loose it was impossible to use).

 

[Slash]

Are you forcing it when it locks? That may be the problem.

I'm really trying toIt turns so smoothly, so it never locks(almost never). If more pieces will be broken, I'll send an email to mefferts(I hope the really send me new pieces)