Did a search for "upgrade guild" and did not see what I needed to know. So, I have a tier 2 hall and wish to upgrade it to 3, do I pay the difference (which I think it should be) or do I lose my 50 plat for the 100 plat cost? 150 plat is a lot, I might as well just create a new guild for that price...what 20 more plat for a charter...thx for answering!