the cross member I built, because I wanted to maximize my clearance. it is trussed on top out of sight, the front tranny skid has 1x1 square tubing around it, so it doesnt move. and the the back one has 2" flat bar around the outside edges and with the bulge in the center it is extremely strong. It does have an access hole in the back skid, at the lowest point , so it drains fairly well(it is hard to see in the picture)and that allows u to drain the transfer case.
for wheeling I dont do mud unless I have to, I would rather crawl rocks, and I regularly drag the skids over them with no concerns. my biggest problem is that the cat is now low enough that it drags also
and I just havent gotten around to countersinking them yet, but that is on the 2 do list