A final comment just in case it may be useful to someone.
After True temper guided me through the solution to my leaking control valve issue, I assumed all would be well. I put in new o-rings and all was well. No leaks. Until - After using the FEL for a while (a few days as I recall) and under load (i.e., pushing into and curling up to move dirt in somewhat hard ground, I saw it leak again. Well, I took it apart checked and replaced o-rings and again all was well for a while - until a few days later, again under load - a leak. I thought of everything that could be causing this - wrong size o-rings? Nope. Nylon ring worn - didn't appear so. Took it apart again and examined every part. By now I think I could take it apart and put it back together blindfolded. But then I recalled that when I was taking it apart again the two screws that held down the spacers which in turn held it all in tight were looser than they should have been. I retightened them again. And believe me, I was really tightening these screws each time - to the point I was concerned the allen wrench was bending and concerned I might end up stripping the groves in the screw head. I did not think it could be tighter - but now when taking it off again the screws were much looser than when I put them on. So - maybe the oil got down in the shaft and was letting the screws loosen up under pressure? I put it all back together and this time added a lock washer outside - just under the screw head, and again really tightened it all up. So far so good. Posting this just in case someone else comes to face this. I am assuming I have now fixed it.
