I need to do the same thing. I've been avoiding buying a lift because it will mean a new router, and to me, it's not a "sexy" purchase since I only really use the RT for edge profiles and pattern routing.
Maybe it'll be my next "big" buy. Or maybe Roubo hardware will be. It never ends.
I was talking about the cross braces on the legs. The middle stretcher is very important. With a wider table the mid height isn't so bad but they bother me personally at that height I'm ALWAYS hitting my shin on them Personal preference there though cause some people don't like kicking them. I always kick me feet up and use them as a foot rest.