Handle bar extention for Croozer

I recently bought a Croozer so I can go running with my youngest. (a Croozer is a 'stroller' you can also use a jogger-cart and bike-trailer) Unfortunately I am quite long and found that my feet hit the back bumper when walking/running.So I lengthened the handlebar with a 15mm pipe and used 3D printed parts to make it fit and to have a nice finish. I also uploaded the solidworks files, if you want to change something. I printed with 100% infill. I would like to point out, that NO plastic 3D printed parts are used as a structural part: the handlebar is connected to the cart using metal at all times. Use a metal pipe with ouside diameter of 15mm, and drill holes on both sides. The distance between the holes is the extra length of your handle bar. The 15mm pipe fits exactly on the handle bar side. Inside the handle bar pipe, there are 4 ribs (see picture). I created a part to fill the space between the ribs with the hope that the 15mm bar will locked better. You can choose not t