Is this a 5 gallon batch? I used 6oz of saaz in my bohemian pilsener. I'm not an expert on lagers, as that was my first one and it just went in to the keg. I think that as long as you have the water right it won't taste too bitter/harsh and you can hop it up. I used the recipe from brewing classic styles.
__________________ SEMPER FIDELIS ET SEMPER PARATUS Bringin' the 'pane...the propane.
I left out my 60 min addition when I was writing it. Saaz is expensive as hell here so I am using 1.75oz East Kent Goldings at 60, then the saaz for flavoring and aroma
That makes sense on how you got to 37 IBUs. I like the hop schedule the way you listed it. You are going to get more flavor and aroma out of the multiple additions under 30 minutes than just doing 30 minute addition and a 1 minute addition.