Yep run the tanks separate if its possible...... I'd still get a long range tank on the rear though, someone I know has one on his td42 and I'm pretty sure it doesnt sit as low as what Westy suggests, I won't get a look until next Friday though.
My tank is actually only a 80 lt jobby and its a very lucky day indeed if I see 400 to the tank....... Most times its any where between 320 to 380 but obviously that depends on many factors...... They're a thirsty beast the tb42 but I didn't buy it coz it was frugal
Don't stroke it, TAP it!!!!.....