It might be completely flat but this is because you force the excess glue unevenly in to the sponge, which will of course also create a uneven performance of the rubbers depending where the balls hit.
not convinced this is true.
earlier in this thread you find people doing what i do but with a device putting slight pressure on the rubbers. its a link to some german website.
Count the pimples then divide the weight by that amount and you will probably find every pimple has to carry sweet f-all 😂
I don't think that the sponge is affected by wet gluing. The blade might be, but varnishing it overcomes this problem.
Because the bouncier rubber may lack something else. Also, even the bouncier rubber can be made even bouncier, if that's what you're after. Weight to an extent is also desired, as it can also add power to your shot. A study showed that the same racket with the same rubber is faster when there's a rubber glued to the other side compared to no rubber on the other side, meaning that the weight of the setup also contributes to speed independently.
On one side quite thick Chinese factory glue is indeed easy to remove, on another after 3 regluing in my regular way the glue residue is thinner that this factory glue. I just don't bother about removing and keep it simple.
I do understand that, 5kg on 1000 pimples is 5g per pimple. It's the longer time the force is applied compared to a bouncing ball that worries me.
You shouldn't worry about that. Pimples are not so sensitive. I've been using racket press for years and I've left the racket overnight sometimes.
