" About modified veggie oil. Castor is a veggie oil. Has anyone ventured to do the mods to castor? Why not, and what might we get if we did? Or has all of that been done for us, and then some, by Klotz? "

Andy, Castor is allready highly saturated and hydrogenated so theres not much we can do accept add vitamin E to stabilise it to reduce/stop varnish formation- but it is this varnish that protects under extreme pressure and heat.
I think all Klotz does is heat the oil (to 1/ drive out moisture, 2/ modify the molecule chain to make it mix better with petrolium products), and filter it. maybe add a dye.
Andy your findings with kero is not surpriseing as it has a high cetane and is also low in viscosity , both desireable in our motors for ease of starting and throttling.
Re the modded vegi oils, only a good test will reveal if its up to the task as a lubricant , but reports from some long time users seams to support its use, its lower viscosity to castor should also be beneficial to starting and throttling, in my testing motor temps and noise with the modded Olive oil were similar to castor with the benefit of a cleaner exhaust and easier starting.
Stewart