Sure! Here's some examples:
Basic Latin, 8x8, base 8
ABCDEF, 8x8, base 8
Basic Latin, 10x10, base 10
ABCDEF, 10x10, base 10
(I have the base set as above because I'm only using capital letters, is this correct?!)
Also, if I've saved a template with the Basic latin character set, then change the character set to custom (eg. ABCDEF), when I save the template it still has the larger grid from the previous character set. This doesn't happen every time, seems random.