sounds like you had good results on both of these!
Wow, you're fast. That's 6 sec. ahead of me racing head-to-head with my son for my fastest 400 in a while... At my local track workout, we've got a guy who out-runs me on many of the intervals who just turned M60, and he's got a goal of sub-5-minute mile. Apparently, if he makes it, he'll be on a very short list. Very well done on your top 10 spot on a similar list!
Wyatt thanks and great to see you and your son doing track workouts. BTW what is the name of your M60 guy?