When to switch from a pre-made bat

 Hi Alois,

As an intermediate player, I'd like to know when to switch from my pre-made bat (DHS A6002) to a custom made bat. Although the A6002 is the best pre-made bat, its Chinese rubbers are heavy and the sponge is hard, though other brand's pre-made bat aren't as good. With a custom-made bat, I could mix the Chinese rubbers' hard sponge with something softer.

What would be an "expectation" to gain to the custom-bat-level?

Thanks!

Signed,

ttPianist