I am planning to slowly upgrade to AC. I bought an AC68u, AC66r, and a linksys re6500. I am planning to use the AC68 as a router and the 66 and 6500 as wireless bridges. I was wondering if the slower speed of the 6500 will bottle neck the connection to the 66r. I am asking this because I have read that some routers will have the wireless speeds capped to that of the slowed connected client. Is this true? If it is, I'd rather exhange the 6500 for another 66u.