Technical info pro rmk rear suspension width

Front and rear are the same, they have the dimensions of the inside shaft on the Polaris online parts pages for the rear suspension... inside shaft is what gets held by the bolts when they are tightened up...
http://www.polarispartshouse.com/oemparts/c/polaris_snowmobile/parts

Hmph. I saw it there I swear. I was comparing the front and rear inner shafts between Pro suspension and IQ Raw suspension, the shafts were the same size but I had to convert from metric to standard to make sure since the Pro is metric. The bolts are different, metric on Pro, standard on Dragon. Let me check out where I saw that...

Ok, looking at the 2012 800 Pro RMK microfiche it has the dimensions of item 7 which (I will check) is the same shaft front and rear. Here is the URL I am using (local dealer for me):
HERE
Pics attached.
Rear shaft part number and dimensions: 5137223 SHAFT-19.05 X 391.414
Front shaft part number and dimensions: 5137223 SHAFT-19.05 X 391.414

I have 2015 arms in front of me. The front and rear cross shafts are the same at 15.4375" wide.

Just ASSuming something from the pictures in your posts.

I installed a Pro skid into a M7. Best thing we've done to the old antique. Needed the assault rails to make it an easier install though.

I need to get some information about the front torque arms as well.
I have been looking at the part numbers and the 2012 Pro front torque arm is part number 154272-329 and the 2014 (which I have) is 1543026-329.
I have busted up my 2014 arm and am looking at replacing it with a 2012. The difference I see from the parts fiche is the inside diameter of the 2012 is 19.05 (.75) vs the 2014 which takes a .8 shaft.

The reason im looking at changing this is I could easily put a .75 solid steel rod in the 2012 for better support as this is the 2nd time I have busted the front torque arm. The .80 rod would be harder to find and might even be a machined item. I don't have access to a lathe so I am doing this with the tools I have available.

A couple questions about this. Could somebody measure the inside and outside diameters of the upper tube from a 2012 and from a 2014 for me? I would like to know if the 2014 tube is a larger outside diameter than the 2012 or what was done when the larger shaft was used in the newer models.

Whats you thought on this mod?