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You've just helped me to realize what I saw the other day at an auction. A particular N had a pipe piece brazed onto the transmission cover, and I couldn't figure out why. Now I think I do know. It would be a fluid return for something cobbed up as you're wanting to do. You can't do a fluid return from a double acting cylinder through the existing lines. But you can if you use the existing hydraulic pump as a constant pressure source, and vent seperately into a return line that just dumps down into the transmission area. That could work. Shouldn't even be to hard to do, though I wouldn't be surprised if I'm missing something, and one of the others points out a flaw (I'm no hydraulic system expert). And as long as I'm commenting, I'm not sure lack of speed is going to be a problem. I've got a front pump on my loader, and at full throw of the lever, the durn thing is just too fast. The estimates of full speed using the existing pump sound like the sorts of speeds I normally use when operating the loader. Doing it faster just means I drop things, damage things, and bounce the tractor all over the place. A handy feature of a hydraulic bucket instead of a trip bucket is its ability to get the tractor out of whatever you've gotten stuck in. I've walked my tractor back out of the muck and mire with the bucket more times then I'd care to admit. :-)
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