Thanks for the insight.
I may need to go your route with the pro if and when the need arises.
This Saturday I rented a 50 ft snake, but the head was not the width of the pipe diameter, it was smaller (and it broke off too). But I ran the full 50 ft into the pipe, pulled it out a bit, ran some water into the pipe, ran it back in a bit, and repeated the process for about 15 minutes.
It seems to have worked, as the pipe now drains really good. But, if as you say all I did was punch a hole in it (goo)... well, time will let me know I guess.
Here's hoping though.
By the way, what proper equipment did your pro use? Just a snake with the correct size head to scrape the pipes?
Thanks for your reply.
Regards,
Geoff