AXS Reverb 170mm for a medium Rail 9.7

[Stihldog]

This may not be possible.
I’m still waiting for my 150mm AXS reverb (ordered early October 2021).
Bike; 2020 Rail 9.7 medium.
A 170mm AXS reverb dropper makes sense to me now. I have 47mm of shaft exposed (see pic) but I might raise it a few more mm (50mm exposed shaft) which could fit better.
Has anyone fitted a 170mm AXS reverb dropper into a medium Rail 9.7? My inseam is 32” but I’m only 5’9” tall but I want to drop right down on steep decents. A 170mm dropper could let me slam the saddle further down and still maintain the correct seat hight when in the raised position. I currently use the stock dropper for a 2020 medium Rail 9.7.
I can’t seem to find a chart from Sram or Reverb for a “go” or “no-go” for the AXS reverb dropper on a medium Rail 9.7. I’d cancel my order right now and reorder a 170mm AXS reverb. Another wait but it might be worth it…or it could be an expensive mistake.
I thought of shoving a pvc pipe into the seat post as a test-fit to determine the post insert length or just use a measuring tape. Any tips or suggestions or experience?

 

[Stihldog]

Update; Went into the LBS and we crunched the numbers. They ordered me the 170mm AXS reverb.

 

[GlynRS2]

Burried deep in the SRAM website is the Reverb AXS specifications and frame fitment guide:

Reverb AXS - find the setpost length that fis your bicycle frame

It should give you all the measurements that you need.

If the 170mm AXS does not fit, have a look at the OneUp Components V2 dropper post. You can probably fit one of their 210mm droppers in less space that the AXS 170mm and is only half the price.

 

[Stihldog]

Another update; It fits.
Original 150mm Bontrager dropper.

New 170mm AXS Reverb dropper.

The new dropper allows me to extend the saddle hight slightly and drop slightly further. It doesn’t look like much difference but there’s a significant improvement. Also the speed is much better and the activation is easier. I know this is a luxury but there’s no longer a cable with multiple bends thru the frame and the cockpit is less busy.
After a few weeks of use, and getting use to the new methods, I really like it. I just don’t want to break it!