In case you are having trouble rendering this model here is my settings : 

1200px by 600px 

Sampling : 200

Light Paths : 

Transparency : Max: 7  Min: 0

Bounces: Max : 7 Min : 0

Diffuse : 6

Glossy: 6

Transmission : 6

Volume : 0

If you have any questions please put them in the Q & A section above. Thanks!