We have an old timer who were trying to get into commercial (from residential). He said he wants to learn it but a few times on some commercial stuff he gets all confused and panics and "Freaks Out". Starts cursing, yelling at people, and has walked off the job a few times. Were making him look at blueprints and I'm starting to think he can't read. He is mellow and confident at residential but on certain more technical commercial stuff he just gets all uptight. Pigeon hole him in resi or slowly force him to learn commercial ? He is over 60 yrs old