Yeh, that sounds about right however I ran them on the 1st day they were available and the BOINC scheduler would reserve a full thread for them after the 1st one. So it may only be using 16 seconds of compute time but when the scheduler won't allow another task on that thread for the 10 minutes it takes to complete then it is in effect running as non NCI. When you are running 12 tasks that take 30 minutes then anytime a new ALX was downloaded it would get to run almost immediately ... I guess due to debt. Anyway, after the challenge I will look into it again, but I'm not going to sacrifice a thread per machine at this time even though I want to upgrade to a silver ALX badge. It has been a very long time since they had anyting available.