Fishing the Wood River this year in RI I used my 8'6" 4WT that has medium Fast action, do to over hanging trees I had to roll cast the whole time (actually most of the places I've fished in RI have required rollcasting). Places were I need to cast out only about 4' of flyline plus 9' of leader I try to only flick it with the tip so I can just get the leader to turn over. It feels awkward and I wouldn't really call it a cast but after a couple attempts I can work out how to flick my wrist to get the fly to do what I want. You can also rollcast a small amount of line by holding the rod low to the water and bringing it up a little over 45 degrees above it and about 2 o'clock to your outer side (to your right if you're right handed) then whip forward. Also if you have to you can choke up on your rod above the handle onto the blank, just remember to stay below the first furrel or might lose your but section of your rod.