you can try hardware stores for the brass tubing.

but as it is i don't really that big of a problem with it.
Just make sure the tubing you have don't come off..use culking glue or what have ya.

you're not going the want the tank to be sitting up against the fire wall anyways
not sure if you're planing on wraping the tank with foam...I do. That pading
is going to move tank further back so the tubbing is not going to kink.
Leave it long and slice it back a little bit at a time.

plus I think you're going to want to move the tank back as far as you can
having a heavier engine on the nose. it's not as if you're going to move it back a foot.lol

you should have extra fuel tubbing laying around anyways

I don't know...a couple pair of needle nose pliers are nice to have. that's what
i use for tight spots. A .40 is going to give me what ?...a hair more worth of room.

you can always use a different size prop or pitch..if you think the engine has too much power.

it's just fuel comsumptions that's all.lol yeah wake up the left thumb.