Switching from Luxon to Kurzick

I tried to search this but got everything but what I wanted. I am about to assend as a Luxon. I looked at their 15K Armor and I really like the pics I've seen of the Kurzick's better. My Question is can I continue on the Luxon side, defeat Shiru, then switch to the Kurzick side and do the same? Or do I need to stop now before I kill the Dragon and start the Kurzick side?

Thanks

You don't even need to completely switch sides. If you have more Kurzick faction than Luxon, they will trade with you while the Luxons won't. If you have more Luxon faction than Kurzick, they will trade with you while the Kurzicks won't. Just spend all your Luxon faction (so you don't lose Kurzick faction when you redeem Luxon faction) so you're down to 0. Do a simple quest to get Kurzick faction. Either keep doing Kurzick quests to gain amber or acquire it a different way (buy or trade). Even with one quest done, you should have more Kurzick faction than Luxon, so you can deal with the armor crafter.