GSXR,
The question is should I pop balance given the situation and costs below:

I will be running my vehicle shortly on waste vegetable oil from a local Thai restaurant. I have an Elsbett kit arriving from Germany that contains special injector nozzles. My local diesel injection shop went out of business (#?!@#) so now I face an hour trip one way to Cincinnati for pop balancing. The car runs pretty well as is. I am thinking of doing this with my brother (trained as a mechanic, works on his own cars a lot, but never worked professionaly.) We will be doing the rest of the kit together and enjoy getting together. He's getting very interested in WVO too. I have bosio instructions which should work. I am thinking I should forego the pop balancing given the loss of 1/2 day work plus auto rental. Its going to cost at $89.75 per hour. Could easily be $450 job or more. Since its 1/2 hour per injector minimum. Free with the brother sounds pretty good, but no pop balancing unless we somehow got loan of pop balancing rig.

I have thoroughly clean up the engine and I am tracking down fixing fuel leaks. My issue with winter running that I alluded to previously (super cold, starts, but runs like cylinder missing until fully warmed up) may be accounted for. A custom curved hose appears to be leaking and I am replacing with stock hose soon. I am hoping this is the main leak. I have a reproducable problem where if I park with the car pointing up hill, I lose fuel out of the lines (assuming this as it takes 45 seconds of cranking with gas pedal floored to get the car going.) Done it 3 times recently.

I tightened up some of the injector lines at the pump, but there is still seapage seemingly around the plates where these attach. I am going to try a variation on the well known trick of changing the fuel filter and putting ATF in to clean injectors. I intend to add about 75% ATF and 25% ATF based stop leak (most are pure stop leak) to a new fuel filter. I will then run the car for about 3 minutes and turn off over night. The hope is this will swell the seals and contain the leak.

I am having to become a leak Nazi as vegetable oil does not really evaporate. Any leaks will eventually find there way to the ground. Not as ugly as an oil stain, but equally hard to remove. Ran the car on pure canola as a test for about 500 miles with the car unmodified back in August. Leakage with waste may leave the sent of Crab Rangoon on friends driveways. I want to try to avoid this. Have thoroughly cleaned exhaust area and engine to watch for any kind of fluid losses.

Thanks for all your help and suggestions.