Well Tony from my experience with Acrylic. 4.5 would not cut it I dont believe. If it were me in your situation 6mm would be the minimum.
even my overflow box i built with 4.5 flexes and it's only 10" long :shock:
__________________
No matter what the morrow brings, inventors keep inventing things.
-----------------------------------
Jonathan
-----------------------------------
www.cakerybakery.ca
|