There's an entire faction of people who believe that carburator floats need to be as high as possible, and there's some significant difference in the venturi effect a carburator induces to consume fuel if the floats are set slightly lower. I don't believe that myself. If you are an 1/8th" lower than the highest possible height, I don't think there's enough difference in carburation to worry about it.
The thing that is significant is if the floats are high, then they leak. If they are 1/8th" low, they never leak.
I remove the filters on the petcocks in my fuel tank... Why you ask... Simple I put a clear filter in the fuel line so I can see if there's shit coming from the tank and clogging up my fuel supply. I can also turn off the petcock and change the filter or tap it out to clear it if I'm out on the road and there's a clog...
If your filter is located inside the tank, you can't clear it without draining the tank, and you can't even inspect it to know if it needs cleaning. Here's what mine looks like...