Brick compatible track system

After getting a brick railway set from Grandma, my boys needed more track. Rather than wasting precious Brick train track (it's expensive), I decided to make them a very simple system they could assemble on their own using U-profile aluminium often found in LED and lighting shops. There are four parts.

1. Ramp; this leads up from the Brick train track to the aluminum track. You will need 2 at least. The are only brick connections on one end.
2. Support; the aluminum U-profile slots into these simple supports. For the 2m long sections of aluminium u-profile I have, I used 4 in total.
3. Connector; this joins the ramp to the support. It works either way and keeps the track and ramp aligned. Rather than break it will pop off if kicked (which happens with my boys quite a bit) but is simple to attach/reattach. They work in either direction.
4. Bend; can attach to either support or the ramp.

This system is designed to work with aluminium u-profiling sized 10mm x 10mm x 1.5mm. The supports have holes as I thought the connection might not be rigid enough without them. However, I have never needed to use them. The aluminium slots in with a firm push. 

I have included step files for each part so feel free to change or adapt it. 

Everything prints in place and flat. I used PLA and 15% infill as strength really isn't an issue with Brick models.