"Chris had a question about Greg's product and after Chris challenged it, Greg replied with a childish derogatory statement. Is that how what you do when you can't back-up your statement with concrete evidence?"
Spongerider showed you the answer in the link in his post. Many people have been running those spacers for a long time with no leaks whatsoever...which is what Chris was challenging.
Anyway...for the frame of reference, spongrider's car hardly ever goes to Greg, he has a garage and he works on it himself :-).