@Peppe90: This gap-issue is NOT 'for all'... It is ONLY 'for those' who don't know that they cannot attach the Adapter like an original adapter, because it is not perfectly copied off... However! Attaching it non-parallel first and then sliding the other side in (i.e. Bottom first, top thereafter) does allow all of these these adapters on all ExpansionBay-Models to fit in (quite tight, but without cutting, without a gap and without some connection- or break off pins-issues, some people reported)! @SoloNoco: Yes, that small gap is quite normal... I will detach the GameStar-Adapter and show you how a 'big gap' looks (while the HDD is often still working) + hold a means to measure the millimeters close to it. Yes, your new HDD is faster and your conclusions (or assumptions) about it is/are correct as well!