Driveshaft shortening

One major advantage to having something like this done by a shop is "Warranty and liability" and not hoping that the job was done correctly. Not everyone is a capable welder or has much fabricating experience, telling someone that it is easy is easy. Seldom is doing something that you have never done before easy the first time. There is always a learning curve and everybody's is different.
The flip side of saying " I did it " is "it was my own fault"
Yep I agree but if you never try you will never learn. I have done alot of firsts on this project now I am alot more confident in my abilities. Made alot of mistakes and had to redo alot of stuff that ended up costing more than paying someone to do it but in the long run I learned valuable lessons that you can't learn by paying someone to do it for you.