Something that we have always had on our HRA searches which I think is underutilized is the Broodmare Sire Summary
If you are a breeder with a mare by 'ChampX" you can find ChampX's successes as a broodmare sire with one easy Broodmare Sire Summary search (you find it on the same tab toolbar as you see the new Gold Crosses option)
After clicking on this then choose either Lifetime Starters or Lifetime Winners
If you choose Lifetime Winners the default sort is Richest first which is a good one for showing you which sires have really clicked with your broodmare's sire
Let's say you are contemplating a particular sire for your mare, you can change from the default sort to Sort by Sire before clicking Submit and you can see how he has performed with broodmares with the same sire as your mare
I know this sounds a bit convoluted - you can see why HRA produced a video to explain Gold Crosses
The attached image is the start of a long report of all the sires that produced winners with Classic Garry mares