Where are you attaching your pen tab to your Surface Pro 3?

Cool stitching work, Mick!

I went with the Leuchtturm1917 loop (they sell it on the Microsoft Store and Amazon, but I bought mine in a bookstore).  Much tighter than the existing loop.  I now have the original (red) loop on my keyboard, same place you stitched yours, and the 1917 loop attached to the top right of the tablet.  I trimmed the adhesive pad of the 1917 so that it sits flatter -- the embossed Leuchtturm brand made the corners lift up.

It's nice having these 2 options for putting my pen. :) Before I got the new loop, without the keyboard, I used to stick the pen's clip onto the magnet of the power source, or where the keyboard attached, but I was always afraid it would fall off.  

I think if the pen clip were redesigned a little bit so it fit in either the charger slot or the keyboard slot, that would be much more useful.  I never really actually clip the pen to anything anyway.

I attached mine right out of the box in dustless environment, using high pressure clips told hold in position and a heat gun to activate the glue.. left to cure for a good 24hrs before sliding a pen into it.  And it stuck well for about 3 months. It was the quick pulling/pushing it in-and-out of the bag action that eventually shunted the loop's plastic section with adhesive underneath open and it folded back into a crease. From then on it was screwed. Like that game "Pull the handbrake at anytime, it's a surprise!" This thing was falling out twice a week at surprising timings and locations.

Yep! So the answer to this discussion's headline "Where are you attaching your pen tab to your Surface Pro 3?"  is... Custom Fittings Required.

Cool stitching work, Mick!

I went with the Leuchtturm1917 loop (they sell it on the Microsoft Store and Amazon, but I bought mine in a bookstore).  Much tighter than the existing loop.  I now have the original (red) loop on my keyboard, same place you stitched yours, and the 1917 loop attached to the top right of the tablet.  I trimmed the adhesive pad of the 1917 so that it sits flatter -- the embossed Leuchtturm brand made the corners lift up.

It's nice having these 2 options for putting my pen. :) Before I got the new loop, without the keyboard, I used to stick the pen's clip onto the magnet of the power source, or where the keyboard attached, but I was always afraid it would fall off.  

I think if the pen clip were redesigned a little bit so it fit in either the charger slot or the keyboard slot, that would be much more useful.  I never really actually clip the pen to anything anyway.

Like this!

I cant figure it out myself

The pen comes with a little loop to hold it but no instructions anywhere about where to stick it.