gush
Where is that speedo pic
59/09 bridge works great with RW necks. I’ve tried 57/08 bridge with RW neck and it was a bit boomy/muddy. In a C24 I found 59/09s to be a bit too shrill though.
Your shrill comment is odd to me but to be fair I've realized that you need to consider the amp w h en describing PUs.
I stI'll play a 1994 5150 head and that amp tends to be bright so much so that HFS PUs sound brittle and harsh. I can't get that PU to soften up on my amp unless it's detuned to D or lower. I've played an HFS on other amps and was pleasantly surprised.
You are correct though, 5909 on my amp does get brighter with the volume rolled down but I can't say shrill or harsh.
What kind of amp are you using?