Latest..Beta sent me the new modified (by Beta) top plate and I installed it a few days ago. Fired up the engine at 1500 rpm and ATF, again, started bubbling up out of the vent. I reminded them that oil changes have not been clean. There is always a sludgy grease that comes out with the ATF. The first oil change was really ugly. Twin Disc said it is a preservation compound and will flush out. I told Beta I think there is some of this grease that is not allowing drainage back to the sump. Several days later, I received an email from Beta agreeing with my assessment. They said they would take a new saildrive and flush it out and run it on their stand. Assuming it works, then send to me. I suggested that maybe Twin Disc make up a build not using this grease since it would be used immediately. This eliminates all variables and Beta agreed and made application to Twin Disc for such. If they refuse, then we take a unit from Beta stock and flush...At least things are progressing and one way or another, a new flushed saildrive will be supplied. 3rd time....