No gas smell = no gas leak?

[ericzacha]

I have a new to me 1988 300 SEL and I'm in the process of replacing filters changing fluids, etc. Changed the fuel filter today (car has 92,000 miles on it and I don't have any maintanence records, so I'm just assuming that it's never been done). In the process of doing this I must have torqued the fuel pump because after I put everything back together I had no leaks from the filter, but a small leak between fuel pump and fuel line. Tightened it up, and no visible leak. Put some baby powder on it, and discovered it still had a small leak. Tightened it again and now no leaking. The paranoid part of me is, well, paranoid. If I can't smell any gas now, is that a pretty sure sign that there is no leak or do I need to replace the fuel lines and copper washers to be safe? Input from anyone with any thoughts on this would be appreciated.