Has anyone successfully used the USCartool A500 Crossmember?

jrlegacy23 said

I know you were not asking me, but I used an empty trans case to mock in place. I had to trim a little more (where the red is), not wider but what was already cut. Pretty much just the part that touches the floorboard stays.
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Thanks. But I am CLEAR on where to cut. However the US CarTool cross member comes with another piece that is supposed to get welded to the cross member itself. That piece holds the rubber mount.
My question is how do you determine where on the cross member so you weld it. @MileHighDart ?