A minor setback

Everything was going according to plan. I had the motor centering nicely, cutting the bellhousing to clear the motor was going well. Then disaster struck. While "tapping" the centering ring into place for the nth time, the clutch release bearing sleeve broke off. I was using a rubber hammer, honest. This is either the end of this gearbox casing or the end of my plan to center the motor. I think I'll get another gearbox.

I'm going to try welding the sleeve back into place. This will do for further test fitting but won't be sufficient for proper motor location. I haven't successfully welded aluminium before so this should be interesting.