Saw this thread and figured I'd try one and see. I wasn't happy with the instructions, couldn't really tell what to do, but it only came with two pieces, so I figured one went in one end and one went in the other. Brilliant, right? The instructions say to press the clip end in first, but I put the tip in first then pressed the clip in after (I use one of those pens presses with the hole for the tip, see attached). I think if I tried to push the tip in second it might have left the gap others are experiencing. Even after this, it seems like the tip is not securely fastened, seems like it might fall out on its own. I like the look of this kit but I think it needs to be re-engineered.