DVA Report

I'm looking for help to determine an engine vibration from page 6.

Attached is a DVA report for my 06 Intl 9400i VIN:6C201618, C13 KCB nondpf, RTLO18913A, 3.36, 1850 Easy Pedal, no PTO, 1,106,320 miles on chassis at the time of the test (30 Oct 20). I tried attaching my maintenance spreadsheet to this post but I don't know how to change its extension name.
I've included entries from my spreadsheet that I thought might be pertinent.

06/18/13 702873, 18561 hrs, C13 Platinum Overhaul
11/20/13 739474 Replaced rt front cab mount and both front cab bushings
03/03/16 866537 Replaced speedo sensor, clutch brake, pilot bearing, shorten drive shaft, new trans
synthetic oil, Easy pedal 1860 clutch (208925-20) / Reman RTLO18913A (changed trans
from FRO15210C)
10/31/18 1075039 New steer tires – Sumitomo ST788SE, new steer box, new drive tires – Mich XDA Energy
12/12/18 1075039 Water pump
12/28/18 1075059, 24999 hrs, Replaced steering column in cab, tie rod ends, rear suspension bushings, all
eng mounts, rebuilt 5th wheel, left front air bag
01/09/19 1075083 Replaced cab air bags and shocks, rebuilt air dryer, steer axle springs and U bolts
09/30/19 1077981 Vibratech crank damper, wheel balancers on steer axle, rebuilt main driveshaft
03/15/20 1089107 Installed driveshaft balancers from Balance Masters
06/23/20 1099715 3 axle alignment- Chad Hohn / MD Alignment
2 Updates:
1. Two weeks ago I had the steers tires balanced, took a total of 10 oz for both tires (5 oz apiece).
2. Last week I had the main driveshaft (2 Shafts) redone again at a different shop. Below were my findings:
a. The shop that rebuilt both shafts in 2019 balanced them as one unit. Both shafts were heavily balanced when checked individually.
b. I assume that that shop did not straighten the shafts, only balanced them.
c. Just an FYI: the Balance Masters driveshaft balancer 'balanced' out 4 grams. I removed it.
d. Both shafts were straightened to 0.005" or better and balanced individually. The yokes on one shaft were 3 degrees apart, it is now 1.4 degress apart. The other shaft is 2 degrees apart.

 

They are rubber.

Do you know what component on the engine is driven at a 0.874 drive ratio (i.e. 1.144 times the engine speed)? Do you know if the air compressor needs to be 'timed' on a C13?

 

There is no unusual noise. There has always been a vibration at idle. The new crank damper didnt seem to change much. Is there a way to test a crank damper?

My mechanic had already installed the duratune carrier bearing before the DVA test.

This thing is a hot mess I guess.

Thanks again for the help.