where do i change second proffesion to mesmer

im a R/E and im getting more into gvg and pvp so where do i change my secondry proffesion to mesmer? please help! i am escended.

I *think* that it is in Destinies gorge, but this is not really the best place to post...maybe try searching the forum that deals with quests and the like (called the tyrian explorers league?) or guildwiki...

If you have Factions, you can change subclass as many times as you want at Senji's Corner at the Profession Changer. Cool thing is, all the skills you obtain for each class you retain, even if you switch subclasses 100 times.

where is senjis corner?