Just a little update:
I thought I would add a few more pics for those with the 23 and 2520.
The way I did my install,still utilizes the factory slider and pivot mount.
The two brackets that are bolted to the seat are from JDs' attaching parts kit. I know someone posted that you can get those separately instead of having to purchase the whole kit. The two rails are M148651 and M148647 (Thanks PCABE5:thumbsup
They aren't cheap (I think 70.00),but then what is from John Deere. The two mods I had to do was slot the seat mounting hole,as it was not inward enough,and cut out part of the bracket where it sat on the back of the slider frame where the factory snubbers used to be.
The seat does slide back as far as possible,but there again the back is alot more meatier too,so it won't go quite as far as factory.
As for the seat sitting higher on the tractor,there is no way around this.As you can tell,it is much thicker (cross section wise) than the factory seat. If you look at the top of the seat back in relation to the hazard lights,the factory seat is 1/3 maybe halfway up the light assembly,where the suspension seat is at the top of the light. If you are a large person,it may be difficult getting in and out of the seat,but IMO,it still can be done.
Is this seat worth an effort to install? You betcha it is! My opinion of course.