I would like to replace the oil screen on the 0-320-E2D in my RV-3 with a filter. As everyone knows, there is not much room. Randy Lervold's build site indicates he used a B&C adaptor with the 1.4 inch extension. But B&C's website says it will not fit an RV-3. Paul Dye's photos show an angle adaptor but it is not identified as far as I can tell. I would appreciate details of what works and what doesn't work if anyone has experience.