Frameless glass balustrade on spigot. Height 1350mm

Hi, 

We need advice with a frameless glass balustrade we have been asked to supply and install. 

Job is in qld, Australia.  

Glass, 12mm toughened. Fix to slab with 2 x core drill stainless steel spigots. Handrail to bolt through glass and tie into walls. 

The developer and architect want the finished glass height to be 1350mm . 

The spigot supplier only has calculations to a glass height of 1200mm. 

We are in need of someone to advise or calculate if we can go to 1350mm high. 

We have test results for the spigots if thay helps. 

Any help would be highly appreciated.

J