You went far enough to post this to everyone here, and follow up on it with comment(s). Most everything here is contacting human beings we/you don't know. It's

You went far enough to post this to everyone here, and follow up on it with comment(s). Most everything here is contacting human beings we/you don't know. It's OK. Don't feel so bad about it! If he lists it on his homepage, an email concerning a project of interest is certainly not overly intrusive. Worst case it gets ignored, better case you go back and forth about your implementation.