golfish,
I just got home and will check the standpipe tonight for a hole. I also researched Durso standpipes and, considering the wide usage, Rich Durso should definitely get a patent immediately. If you know him you might want to suggest doing that ASAP. If he has a patent and it is contested it will help that everyone calls it a Durso standpipe but it won't do squat unless he files.
E