Hi Ian,

First of all I would like to tell you that what you are doing is so awesome and helpful couldn't appreciate more, big thumbs up!

Yup it's the SLX version, (8.0 2019)
So I unfortunately cannot measure my saddle height until next week, all I know is that the seattube is pushed up almost all the way, 5mm left to go, and have an ISM saddle. I just have an assumption that the saddle height could or should be around 82cm-s based on Greg Lemonds calculation (inseam * 0.883)
Now the padx was actually measured from the middle of the pad. Thats why I say that the armpad reach looks so small for a tall guy like me. The elbow degree is pretty comfortable as is, although as said I think I can and also should go more aggressive (qualified for 2019 Kona, so performance is priority, not just an all out comfortable ride).
This is the info that I finally got back from the girl I am talking to at canyon, might hold some useful info:

" Based on your current armpad stack and reach value I recommend to change to our frame size M with a short stem. You would also like to have adjustment possibilities to sit more aggressively and you will not have these with the frame size L

You will reach your current armpad stack on our frame size M with an additional high stack spring kit, but I it not necessary. The high stack spring kit will rise your armpad stack for 1 cm. The minimum armpad reach is 448 mm and can be adjust too 556 mm "

Thanks again Ian