Fuel Management w/o mods

[Solusphere]

I'm currently attempting to make an SSTO spaceplane using only stock parts, and i've run into a slight issue with fuel management. Namely, I want to make my plane's four jet engines all draw fuel from the single jet fuel tank behind the cockpit, but it's impossible for me to run fuel lines directly to the tank, as they don't have LOS to each other. Here's a pic, to explain what I mean:

Currently, the jet engines draw fuel directly from the attached rocket fuel tanks, which is a waste of oxidizer. I'm sure there are modded parts I could use, or I could just modify the part configs to add a second fuel type just for the jet engines, but I was wondering if there was any way to avoid this using only a base, unmodified game. Thanks in advance!

Edit: I just realized that the issue isn't as bad as I thought, as I can simply transfer the LiquidFuel from the jet tank to the rocket tanks that have been drained once I reach a stable orbit, but the question still stands, as i'd rather avoid having to do this if possible.

Edited April 26, 2013 by Solusphere

[GoldenShadowGS]

Maybe stick a little Oscar B or Round-8 Toroidal Fuel Tank to sit high enough somewhere that has line of site to all 5 parts.

[K^2]

Go to structural parts. Find the small hardpoint. Place it. Run the fuel lines from tank to hardpoint, and from hardpoint to engines. You can chain these if you need to. In general, any part with fuel cross-feed will work for that.

[tavert]

Yep. A fuel line that goes straight to an engine takes priority over any tanks the engine is attached to.

[Solusphere]

Thanks for the replies! With a bit of fiddling I managed to sort the issue out, and while there are probably a couple minor inefficiencies with my fuel line layout, I successfully completed my first SSTO flight! Woohoo! Successful design:

[Tarmenius]

If the fuel feeds from the outside in, oxidizer will only be wasted if the jet engines use more fuel than is contained in the single tank. I often run similar configurations, and whatever liquid fuel is used by the jets is then drawn from their tank when the rocket fires and the spare oxidizer from the outer tanks are pumped inward, balancing everything out.

If you find you have significantly more oxidizer than liquid fuel when you get to orbit, it means your jets used more than the one tank of fuel to get you there. Hope this helps, and have fun with the SSTOs!