function fuelfordvtarget {
    parameter targetRocketDv.
    parameter rocketisp to 315.
    
    set orewiggle to 0.1.

    set res to gui(200, 100). 
    Set res:x to -40. 
    set res:y to 5. 
    res:show. 
    set reslist to list(). 
    for rs in ship:resources { 
        set l to res:addlabel(). 
        Set l:style:fontsize to 20. 
        reslist:add(l). 
    } 
    on time:seconds { 
        set i to 0. 
        for rs in ship:resources { 
            set reslist[i]:text to rs:name + " " + round(rs:amount,1) + " / " + rs:capacity. 
            set reslist[i]:style:textcolor to rgb(1 - rs:amount/rs:capacity, rs:amount/rs:capacity, 0.3). 
            set i to i + 1. 
        }
        return res:visible. 
    }


    radiators on.

    lock liquidmatched to min(ship:oxidizer * 9 / 11, ship:liquidfuel).
    lock oxidizermatched to min(ship:oxidizer, ship:liquidfuel * 11 / 9).
    lock vectordv to Round(rocketisp * 9.81 * ln(ship:mass / (ship:mass - (liquidmatched * 0.005) - (oxidizermatched * 0.005))), 5).
    print vectordv.
    set isrs to ship:modulesnamed("ModuleResourceConverter"). 
    set warp to 1. wait 1. set warp to 5.
    if(vectordv < targetRocketDv and ship:oxidizer * 9 / 11 <= ship:liquidfuel)
    {
        print "refilling ox to match liquid".
        for isr in isrs { if isr:hasaction("start isru [ox]") isr:doaction("start isru [ox]",true).}
        
        set warp to 1. wait 1. set warp to 5.
        wait until ship:oxidizer * 9 / 11 >= ship:liquidfuel or vectordv >= targetRocketDv or ship:ore < orewiggle.
    }
    isru off.
    if(vectordv < targetRocketDv)
    {        
        print "refilling lf + o to match dv target".
        for isr in isrs { if isr:hasaction("start isru [lf+ox]") isr:doaction("start isru [lf+ox]",true).}

        wait until vectordv >= targetRocketDv or ship:ore < orewiggle.
    }    
    isru off.
    for isr in isrs { if isr:hasaction("start isru [lqdfuel]") isr:doaction("start isru [lqdfuel]",true).}
    print "converting remaining ore to liquidfuel".
    wait until ship:ore < orewiggle.
    isru off. 
    set warp to 0.
    radiators off.
    print "Fuel Converted".
    res:hide.
}