[s7eve]

I think Ibanez trems are cast, if so good luck welding it.

I'm not saying you can't weld cast metal but it's not easy. Few welders can weld cast, it will need to be TIG welded, the material to be welded will need to be preheated slowly in an oven over a long period, the weld needs to be very hot and it should be done with filler rod that is specifically designed for cast. After it is welded it should be thrown in the oven again and cooled down in stages to achieve maximum strength.

I have cheated in the past and welded cast for ornamental purposes with a very hot MIG and without the complicated preheating and staged cooling but I could not guarantee the strength or durability of the final product.