Replacing Mods?

When you replace a mod, say a pommel on a sword, does the mod that's currently on the sword get lost or do you basically "trade" the two mods?

Thanks.

It functions like runes, that is, the currently existing mod is lost.

Guildwiki has a good list of which upgrade goes where for any that are wondering.

GuildWiki isn't showing up for me for some reason... All I see is a blank white page? Is the site screwed up or is it something on my end?

yes it's down

it is not down.

There is an error where people not logged in cant view article pages.

go to gw.gamewikis.org/wiki/insertrandomcraphere

it'll tell you page does not exist, but more importantly, you can create a login in the top right corner - and it works fine as ever once you have a login name.

Thanks