I did get a couple of rolls back from a lab once, and they were absolutely clear, which baffled me. I asked them what they used, and it was a seasoned tank of Xtol, Kodak fix, and a second fixer of plain hypo.
I was never able to replicate their results, but it doesn't really matter since you just print right through the base anyway.
The dilution 1+50 means 1 part of developer mixed with 50 parts of water making a total of 51 parts. Don't you mean 1+49? A small point but newbies don't need to pick up bad terminology.