I'm still struggling with my X,Y tables for my H-mortiser. I've tried
full extension drawer guides and they had way too much vertical
slop. I also looked at under-mount slides today at Woodcraft and
they too had too much slop.

I am thinking about using 4 steel rods (2 per axis) and using guide
bushings. Four bushings total inserted into two separate equal
lengths of wood. The wood would support the table (two per axis).
If I lube the crap out of the steel rod do you think this would work?
Hope this makes sense.