Question regarding boat trailer with rusted cross tubes

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I noticed and liked a post from psacustomcreations, which involved turning down a job to fix a rusty trailer frame.https://weldingweb.com/vbb/threads/1...91#post8840491It got me thinking about a job that I turned down last year.  It was a boat trailer that was worth about $6k. One of the bent cross tubes had been welded with a fish plate in the past and was now cracked.  The problem that I saw was that the crack would allow water to enter the tube and rust it out from the inside.  I turned down the job, but I was wondering if it could be repaired by replacing the entire cross tube with a tube that was bent from the steel supplier.  I would have to check that other tubes weren't rusted from the inside and thinned down as well.  Here is a picture of the tube.

What are your thoughts?-DonSmith Oxyacetylene TorchMiller Dynasty 200DXLincoln SP-250 MIG WelderClausing/Coldchester 15" Lathe16" DuAll Saw15" Drill Press7" x 9" Swivel Head Horizontal Band Saw20 Ton Arbor Press BridgeportLincoln LE  31 MP & Lincoln 210 MP
Reply:ive done one once almost like that one.   if i was doin that one, from what i could see, id make it two straight pieces of rect tube comeing to a widened v shape - for reason of simplicity .     then cut off bottom of v, and weld in  a thick horiz flat bar.   that way the under  clearance is better, or not any lower than originally .    thats what i did.     i had the guy, put his boat in the water, and i picked the trailer up from his work, fixed it, and brought it back by end of day.     that way i made the flat nosed "v" crossmember, and dropped it in to weld endsLast edited by 123weld; 2 Hours Ago at 01:30 AM.