I think I owe you additional comments. I have implied admission of guilt in being an atrocious speller. That is par for engineers, and everyone who has ever worked with engineers knows this. Spell checkers rank high among our greatest achievements. ;-D
Spelling is not a strong asset in the conceptual thinking we do, nor in the implementation of the design. Once the concepts and designs are ready for public consumption, engineers are rarely asked to write the documents or make up the advertising flyers: enter the other skilled people.
I've never seen a technical writer or a market manager who can write software or solve equations for electric servo motor dynamics. I don't criticize them for those obvious shortcomings. We work as a team, each providing a piece of the total product.