I dug out an old enya engine that I got someplace... It was full of old dried castor but it had GREAT compression. I took it apart, cleaned it. probably made a mistake, but I took off the rings and cleaned the piston. Made certain I put the rings back on in the same grove and the same side up. I lost about 1/2 the compression that I had. Will it come back after I run it and the rings seat again? Or should I just get a new set of rings for it and start over? Thanks, B