Very good! Learned something from the heteronym clue.

How is relay a heteronym? Whether you relay a message, run a race or work in electronics.... relay is relay

@Cajun Relay as in a race has a different pronunciation than to relay a message. There is also relay as in to relay tile which is a different pronunciation from the other two as well. This one is definitely trickier than the others because the difference is what part of the word is emphasized.

The heteronyms took me a while, nice challenge!

Excellent puzzle! Props for accepting "heterophones" for the relay clue. I couldn't think of any other way to describe them, so I was pleasantly surprised when my answer was accepted.

got so stuck on armstrongs. like this one a lot!

heteronyms are too good for puzzgrid, race is banger too (^_^)

thank you a milli vanilli amount of times for how epic and interesting this puzzle gridular design has become. i reallyt wish you all the best, and that nothing bad ever happens to that puppy of yours :D
watch out
don't take your eyes off the little guy
he's sure to get into some trouble :D
best wishes
Tedanthony Budleson.

i arm race