Not fussed about the cost of the profile, if it provides an easy build. I've seen this profile with rails on the front and the screw in the middle.

It would be for a wood router so collection of chips shouldn't be an issue as 90% of the waste will be sucked away.

Just wondered if it was up to the job from a technical perspective (ignoring better/cheaper designs). I don't have the knowledge to say if the figures on the drawing are are acceptable for the purpose or how they compare.