Hello Veronica,
You can create your own semi-inflated surfaces when you run @SUMA_Make_Spec_FS with the -inflate option. By default the script uses -inflate 200, try adding -inflate 250 and -inflate 300 and see how that works for you.
If you want to do this manually, which would be much faster, look at the code for @SUMA_Make_Spec_FS in the block starting with comment:
#and make semi inflated surfaces.
You can also look at the example in the help output for -inflate option.
Cheers,
Z