Post screws on SMOK RSBT 2

[milomonkey]

Howdy,

I am having some problems with the screws on the SMOK RSBT 2... they seem too short and there is some room left for the coil to move around which is annoying. 

Normally I put some thick wire in there to get rid of the gap but I was wondering if anyone knows what type of screws they are so I can order longer ones.

Thanks,