If you are anal about prop balancing, here is a different approach.

[Pumpkinguy]

Just because you buy top of the line props doesn't mean they are ready to go out of the box. Most AV pros know this and spend hours dialing them in.
Being a fan of the quick release prop adapters myself, I have them on all my tmotor/tmotor clone props. (As a side note, the Drones Vision brand are the best I found)
Most guys will slap the tmotor prop in their dubro and balance away. When they are happy they either mount them directly to the motors with a top washer and 2 screws. Or, they bolt the prop to the female portion of a prop adapter as I do. This imo is problematic. First off, I find that the tmotor props are typically well balanced side to side and if not a few minutes with 400 grit gets them bang on. I find the hub balance is usually more of an issue than anything and there really isn't much meat there to work with. Furthermore, even if you get the hub bang on, it will most likely be out again once you put the top washer on. The top washers have a loose tolerance for the 3mm screw and it is impossible to get them perfectly centered.

Here is my solution:

Mount the quick release prop adapters to the prop using 2 x m3x10 screws and a dab of blue loctite and tightened to 15 in/lbs.

I made these 2 adapters with the male portion (motor half) of the quick release prop adapters. One for LH and one for RH thread.

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Now I toss her on the dubro. Please keep in mind always to check to make sure you have a level shaft and adjust the dubro if necessary.

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This is a pretty important step to get a proper balance. This dubro rod is .025" smaller than the adapter rod I made and look at how much it throws the level off. Not being level can make your life hell.
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So at this point I balance side to side first. Then I find the heavy side of the hub. I use my dremil and put a small notch in the top washer on the heavy side. Less is best. Take a bit off and check on the dubro then take a little more until she is perfect.
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Now, not only is the prop balanced but the assembly as a whole is.

In the scheme of things will it make a noticeable difference? It can't hurt.

Cheers.

 

[Motopreserve]

Great work! Going to have to follow your lead here.

Amazing how much twenty five thou can throw it off.

 

[Pumpkinguy]

I did a set of tmotor 17" today. Man, it's a real.dogs breakfast. Some are almost bang on out of the box. Some need 10 minutes of work and some like the one in this pic take an hour to get perfect. Ballancing the hub is a real science with these. This was the only one out of 6 that I couldn't remove enough of the aluminum to balance the hub. I had to add weight to the other side. I used liquid rubber.
My final test to make sure they are perfect is to spin them 3 times on the ballancer. If they slow to a stop 3 times with no bounce back I know they are is close as they will ever get. Cheers.
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