I owned th900 since January this year, and I think this was one of the best investments i had since LCD2. Only downside is that I really, genuinely hate the urushi finish on my cans. Thus, I'm planning to invest in some custom wooden chambers either from martin or lawton, depending on prices and choices of wood. Do I void my warranty by replacing the stock chambers with the custom ones? Are the angle pads + cups worth the price I'm going to have to pay?