One of the most convenient features of the Diamond configurer is that it can allocate CPU memory for you. With the exception of areas whose size cannot be deduced (the stack and heap), you can leave issues concerned with organising memory until your application is working. At this point, and not before, you can optimize your memory use and overrule the configurer.
Even when you do decide to optimize memory use, experience has shown that hints are usually enough. Diamond does provide very fine control of memory, but it is extremely rare for the use of that level of control to be justified.