hi, want to buy a set of these 440 source heads,but was at the cc at columbus, and heard two guys talking about these heads. they said they have heard of 3 different sets that one of the heads was cracked and leaked water. he replaced the head ,but i dont want to put them on and have to take them back off.my funds are limited.has JEFF the porter ran into any problems ? any feed back on this? around the KILCARE area ohio thanks