I'm preparing a '87 325. I'm going to install front coilovers, and have removed the spring perches. I've ground down the part where the perch was welded to the strut tube and a very small ridge remains. The threaded tube fits up against this and extends approx 1" above the top of the tube (The threaded tube approx 6" long is extra from another car , not a BMW. )This ridge is weld metal and very hard, Should it be ground away and the stop be located approx 1" below where this bottom of the spring perch was or will this be all right. My gut instinct is to grind this away, but is that right ?
Thanks all.

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mel horn