An experinent in geometry-help!?!?!

I was wondering if anybody else has considered adding a longer raked fork as discussed in Dan’s “experiment in geometry” article. I’m in the process of making a new tribike selection and am in the decision process of which fork to spec. The $350.00 for the Reynolds Ouzo Pro makes for a costly little experiment. I am thinking about ordering a steel Tange (50mm rake) and trying it out on my Mongoose ride-in-the-rain training bike.
Any thoughts or experiences?
Thanx,
Jay