Clemsonfor wrote: you can drain it and let it dry and suck it out with a flexible tube for your shop vac. May have to reduce it down to 3/8 fuel line or 3/4 heater hose but is doable.
Like I said easy to clean the sediment bowl harder to vacuum out the tank.
I really do not think there is too much of a loss of capacity It is more the issue of stuff staying in the tank. But any increase in the "empty" level could trap water in the bottom of the tank and not get to the sediment bowl.
There are a bunch of posts on tank cleaning. so a clean tank, clean gas storage, and the fine mesh filter on the sediment bowl you are protecting your carb.
There are also many posts about restricted fuel flow issues. If the in-tank filter clogs or is restricting flow in some way how do you know? drain the tank and take out the sediment bowl to inspect the filter? a lot of work vs tunr off the gas, take out and dump the sediment bowl and clean or replace the filter.
I see the in-tank filter has the possibility of causing more problems then it solves. Maybe I an wrong - probably am. It is just one more thing in the fuel system. That makes the fuel system more complicated. The in-tank filter is hard to inspect and clean. It clouds troubleshooting efforts because it is one more thing that should be checked when running down a problem.
I bought 3 of these and was going to do it. Just the more I thought about it the less I liked it. Just my opinion. The original poster was asking for opinions.