I'm about the same PBH. The Stack and Reach numbers on the bike insights link would be great for me. Those numbers are right in the neighborhood of where I shop. That said, I'm having a hard time reconciling the numbers, the date, and the silhouette on bike insights. The three things don't line up.
The silhouette looks like the current Hilsen silhouette, and the date of 2019 lines up with approximately when the current Hilsen was introduced, but then the numbers would be wrong, and the most obvious way they would be wrong is the wheel size. A current Hilsen in 58 would take 700c wheels.
The numbers, including the wheelsize, look like the old Hilsen. But the old Hilsen would have a flatter top tube silhouette, and I think would pre-date 2019.
So, are you absolutely sure the numbers on bike insights match the physical bike you are thinking about buying? Do you have a photo of the bike you are thinking about buying? Did the seller of the bike point you at bike insights and guarantee you that their bike exactly match these numbers?
Bill Lindsay
El Cerrito, CA