Hey! First post here, have heard some about switching out kara's ink with a different nib. I love the softness of the 18k gold nibs (my favorite is the waterman exception 18k), anyone have experience switching out kara's stainless for a different nib? Any suggestions of nibs, can i replace just the nib without the whole feed system, is this something that I can do as a DIY vs. sending to a pen meister? Thanks!