Hogpilot, thanks for the heads up, but after a little more researh, I opted to replace my receiver to get the necessary vertical stretch. I currently have a Pioneer SC-25 and am moving to an Onkyo TX-NR809. I am sad to see the Pioneer go, but I will have no problem recouping the cost of the Onkyo from the sale of the Pioneer. At least this does not cost me anything. I got the whole thing set up finally over the weekend; I was waiting for the new projector mount to come. I feel like the pincushion is pretty pronounced. How much should I expect from a 108" wide 2.35:1 screen? I think the problem may be the distance between the screen and projector. Even with the projector as far back in the room as I can get it, I only have about 12' between the front of the projector and the screen. Right now, the pincushion is approx 2" on the top and bottom at the center of the screen. Another thing I am noticing is a very slight vertical rise in the image when the lens is in place. It seems to have the same amount of zoom, just offset a little higher (say approx 2"). This is pretty bothersome since it requires that I still have to move the image a little when watching 16:9 material. Any ideas on these two issues? Also, I definitely have to add some star washers to the U bracket. Moving the lens in and out a few times causes the lens to droop a bit. I don't think there is enough bite between the bracket and the knobs.
Overall, I am definitely happy with the brightness increase over zooming; but the jury is out on whether the pincushion is worth the extra lumens. On bluray sources, I don't really see a detail enhancement with the lens vs. zooming (just my opinion). For all other sources the difference is much more apparent. If I can get the pincushion a little more under control and fix the vertical offset, then I think I will be a happy camper. If not, I may consider selling everthing and purchasing a newer used JVC with the lens memory and chalk it up as an experiment.
BTW, on a separate note, the Chief mount that I needed to purchase to add the lens and sled is a beast! Way, way better than the garbage, cheap universal mount that I had been using before.