And have you installed a rider backrest? (not a passenger backrest / sissy bar.)
I know there are only a few who have this seat installed to begin with ~ a H-D 'Tallboy' seat P/N 52000134. If you've successfully installed a H-D Adjustable Rider Backrest in your H-D 'Tallboy' seat, I'd like to hear from you.
I visited my local dealer today, and tried to buy a H-D Adjustable Rider Backrest Mounting Kit P/N 54099-10. So far, so good. But when I told her I had a H-D 'Tallboy' seat, she said it wouldn't fit. According to her (and her parts book) "... you don't have a Freewheeler seat, you have an accessory seat." According to her, the slot is an inch, or two, back behind the OEM seat slot.
Oh brother!
Now, we all know that the MOCO Parts Catalog sometimes gets it wrong ~ something that fits on a Freewheeler (like my passing lights) might fit if you have to drill, or enlarge some holes, or get "creative" with Dremel tool. This MAY be another case like this.
Also, I like the H-D 'Tallboy' seat ~ it's cushy, and I ride on it for hours. But after riding for 2+ hours, my back gets tired and I'd like some support, hence the backrest.
I sold the OEM seat eBay months ago. I'm not ready to start buying third-party seats (yet) ~ it gets expensive, and I tried this "musical seat" game before on my Softail.