Do I need angled spacers after the lift on the rear axle?

After the lift I got a bunch of AAA and UUU and also got a few "expert" advices that I need to put angled spacers between the leaf pack and rear axle to even out the angle at the dif joint.
Truck drives good and I don't notice any vibrations or shakes but asking just in case to prevent a future failure.
Rear height now from the ground to the fender flare is 40". Here is a picture of the main shaft at the dif joint.
If I need angled spacers, where from and what angle?

 

If you didnt notice any vibration after compared to before then I wouldnt mess with it

https://www.tacomaworld.com/threads/drive-line-vibration-after-3-lift-install.151949/

https://www.tacomaworld.com/threads/toytec-3-degree-rear-axle-shims.201164/

 

yeah you must be lucky. i had a driveline vibration before i even lifted my truck. got work with the lift, fixed mine with a 2 degree shim.

 

How do you calculate the shim angle if needed? I have no idea about this stuff, never done it before. Truck is lifted 3" from 37" to 40" from ground to bottom of fender flare. Did not do anything to the transfer case or support bearing in the middle of the drive shaft.

 

https://www.tacomaworld.com/threads/drive-shaft-vibrations-solved-step-by-step.244535/

 

I have vibrations at any speed but those are road vibrations since I have 700# springs in front and full RXT Icon leaf pack in the back. Took the truck on a brand new paved road and it feels good but on a regular road it has the vibes.
From stand still to go it has a tiny bit of shake that goes away as soon as the truck moves. Any help or suggestions?

 

Did it feel that way prior to the lift? This guy here https://www.youtube.com/watch?v=f1m-Fh5kiRU goes over everything you need to know about driveshaft angle and tells you how to get the measurements to make sure your in the clear. But again unless the vibe was there before then it can be a tricky problem to fix, springs, carrier bearing, shims, there are a lot of factors

I went through this same dilemma when I put on my lift the video helped along with an app on my phone for measurements

 

Have seen this video a few times and will check all angles.
Problem right now is finding a true leveled place to measure the angles. Garage and driveway are sloped and will throw off the readings.