That is an interesting perspective; "have set him up with sturdier folks". Coming from a construction background myself, I find I need to work on my behavior, as engineers are much more sensitive than construction workers and actually anyone I have ever worked with, even sales people. I work with another guy, who was a previous auto-mechanic and we get along great. Might make sense to add a study as to personalities, dynamics of these teams and what personality combinations make for the most successful teams.