Plastic cover or plastic rim? If the latter, you should research using foam in that application and/or contact Lemar and ask them.
Plastic cover or plastic rim? If the latter, you should research using foam in that application and/or contact Lemar and ask them.
I think he means the plastic sheeting that comes on glass to protect it (looking at the picture/type of tank). You are correct though, you wouldn't want to use foam on a tank that has trim, but on trimless tanks foam is very important to ensure the glass is distributing the load evenly. If the wood/top isn't perfectly flat (hard to do) it can cause issues for trimless tanks.
On the light hangers, did you use some metal L brackets to reinforce the joint? I would be afraid of relying on screws/glue alone when it comes to a light hanging over water.