I just managed, and it's a hack-o-rama -- to connect up some of my micro engineering flex track to some bachman gray ez-track.
It was quite a bit of work but it's noticeably quieter when the train hits that portion ...
That's a big plus for me, but everything else about putting it is a big negative.
I actually measured sound of the track decibels with a small hand held detector I borrowed from a friend -- sorry not clear -- and a small engine and half dozen cars going over it. The track, which is the shape of an oval of 10-15 ft by say 6 or so feet -- sits on plastic topped folding tables. On that is some partial sheets of 1/4 inch plywood. On that is some heavy felt -- yet there are gaps in these things.
The sound results are:
- plastic bachmann track: 72 db over wood
- same but over felt portion: 70 db
- micro eng. track over either: 60 db - 62 db
It's a very noticeable change to me over the flex. If I had 200 ft of the track strung around on that plastic stuff, I think I'd really get annoyed.
This is what happened to me with fastrak (O) -- and that's even louder -- so I ditched it.
The only thing is the bending and soldering of micro. eng. is annoying to me and I think I'd rather just have firm fixed curves or straights.
But this is against what I learned with the o-gauge stuff -- it's better to have longer pieces if possible. It's not only cheaper but there's less connections to go south (create a short).
And I'm still somewhat married to the idea of being able to take it all up...
So the flex is imperfect for me really but I have quite a bit of it that I bought before realizing all this -- so I'm just going to work with it for now.