Surface Pro 3 Wavy diagonal lines when inking

I've had my Surface Pro 3 since this christmas, and also have been experiencing these wavy/jagged lines. 

One thing I wanted to report on that I haven't really seen mentioned in this forum often is that I have found the issue seems to be closely tied with palm rejection. I can't say if this is the same for everyones device, but on my own Surface Pro 3, keeping my palm off the screen makes diagonal lines nearly smooth, as if there is no problem at all.

Furthermore, on my own device, something I found that's even weirder. If I hold the backside of my device while I'm inking with my palm still on the screen, the problem also is also heavily reduced. 

Here's an image of inking diagonally on my Surface Pro 3. Note that I used a ruler to make sure any deviation is due to the device itself. 

I went to the Microsoft store a couple of weeks ago to see if the SP3's there had the same problem, and of the devices that I tried they all seemed to have the issue. 

Is there anyone else on this thread who can confirm that this problem does/does not affect their device in this way? I find it very strange that putting my hand on the back of my surface would help the inking to the degree that it has

I was wondering:

what does Panos have to say about the issue? He didn't seem like a complete ignorant on his products when you hear him talking.....so?

The SP1 and the SP2 both use Wacom technology what should not have these problems. Also the SP2 has nearly identical hardware, so you'd trade the bigger screen and the less weight for the better pen.

I don't want to say that the surface team was simply lying when they said that the problem is the jitter in our hands... but I simply don't believe them:

My 0.1 mm pen rotring inking machine is way more sensitive (even perfectly sentive I would say) that that pen and I can do perfect straight slow lines with it. Even with a one hair brush I can do perfect slow lines with no problem. No jitter at all. Of course with my wacom cintiq I also can perform perfect straigh slow lines. Even more, if the problem really is the jitter in our hands then I don't understand the perfect underlaying reticle that we can see in some SP3 test of several parallel lines. What perfect jitter we have in our hands!

And of course I hardly can see how a more powerfull pen is going to improve the situation at all if the problem is our hands. That excuse is just laugable at best, and near insulting.

This a faulty hardware design that they are selling as a profesional tool for artists when it hardly performs well even for writing.

After returning my SP3 because of the pen jitter I was waiting for the SP4 just in case Microsoft decide to return to the wacom tech. But now I have clear that the SP4 is going to keep the Ntrig pen and its horrible capacitve technology. So I´m just going for the Wacom Companion as the only true alternative for artists.

haha

Thats odd, they still wont recognize the failure. Hard to believe, but obviously true as seen in that statement above..

now to solve the problem I have taken the first two steps,

1. claimed warranty, got a new but still faulty device and

2. sold it for a reasonable price. 

Now for step three: is there any device with pen that doubles as a working alternative?

Any hints are highly  appreciated.

I also wanted to say goodbye to microsoft as a hardware provider and sorry I got a little emotional during discussions, but so much ignorance towards customers and even the pen providers can stress even strong nerves.

thanks to all the fellow users who took a few minutes to post, even If no one at ms ever tried to duplicate...

at least this proofs our point here