Sixer,
I guess that depends on how you want to operate your business, But if we told someone they would have to someone else to do part of our work we would probley not have much work offered to us, for years we have tried to hold on to our work, when i started out in this trade we had to do the wood work, the duct connections for small vents and fans, and a lot of other related tasks, today there seems to be a trend to do as little as possible, As the years go by , i hear more and more it's not my job, or i don't do that, cutouts were always our job, and yes at one time we actually had to take instruction in wood crafts, now your lucky to get trained in all the electrical areas.