I have a fuel filter in my fuel line from my fuel jug. Thats plenty for me.
As for the fuel tubing size, well after yesterday I guess it just may be a crap shoot after all.
When you buy standard size fuel tubing you should expect just that. The tubing I put on my Kadet Senior kept popping off, luckily I had some zip ties with me. It was Great Planes I bought from Tower. I have new tubing on my shopping list for the LHS.