Guys I am cleaning up and checking my oil pump and system just to make sure all is working but I hit a problem.First with the manifold hook up and the system oil pump disconnected I took my whats called a high pressure oil pump and hook it up to the manifold and start pumping.Well I did not get oil to some of the areas such as one of the ways that sets on the knee.So while the saddle is setting on my bench I took it all apart except removing the 5/32 tubing.I pulled out each orific in order since some had #0 and some had #1 with direction arrows. I put my hand held oil pump in the orifice and pump oil through each one with out the tubing hook up and I got oil out except one.I did kinda let the orifices soak alittle in some diesel just to clean them up when I first took this apart.Anyway the one that is not working,I took a small welding pic set and check for nastys inside the orifice which I did get some trash out.But pushing in with the pick it felt kinda sponge so I check couple other and found the same thing.Is it possible that these may have felt inside them to act as a filter or as an orifice?I also clean the manifold while I had it all apart which it also had some trash in it.Took my very small spray guy cleaning brush and run it down the length of the manifold so its cleaned.Next I again hook all this back up and with my hand held pump I was now able to get oil through all the orifice except the one that is removed in the pic.Guys my question is,is there some kind material inside the orifice or is that just some trash?I really don't want to buy no more what I have to cause they are 14.00 each so ouch!Any comments,suggestions,advice please help