Many thanks for getting back to me Hive account@lion200 and for the refund. You are right, I didn't wait long enough :)

I tried again with 1123 Weed to Leo, and then again with 623 Weed to Leo.

In both cases, the queue starts, then returns an error saying it's failed.

I'm guessing there's not enough liquidity.......!?

PS. tried again with just 123 Weed, same error