Stingray Clone Mag Upgrade/Universal Delrin Not Working?

[Trypno]

So I've got a Stingray Clone on my hands, with a button that autofires. I bought myself the Ultimate Upgrade from Fat Daddy Vapes, plus the Universal Delrin Housing. I was excited because the magnets are stronger, and everything seems to fit on the mod ok, but there's one problem. The top magnet (the one that contacts the battery) won't go flush into the Universal Delrin Housing. According to the fat daddy website, these parts should go together just fine, yet here I am with a magnet that won't go into its housing. I don't know if it's too good for it's home or what.
So does anyone have any suggestions on how I can get this thing to sit flush in the housing? I already emailed Fat Daddy to ask him, now waiting on a response...

 

[93gc40]

space too small or too big?? Glue for for fixing too big, knife or sand paper for too small.

 

[Trypno]

It's all good now, had a nice chat with Dennis over at Fat Daddy for awhile, his advice: crank that top magnet with some pliers until it's flush with the housing. Had some struggles, but got the thing firing satisfactorily