Just for fun, see if your observation skills are sharp. Study the engine photo below and see if you can find the detail the builder initially missed on assembly at Corvair College #43 earlier this month.
.
.
The issue was corrected, and this engine put down a perfect break in run on my stand at the college. Use the comments section if you think you see it. Bonus points for the closest guess in minutes for how long it took to correct.