Ivor
You could be dead in seven years or loose a medical in that length of time, get divorced or experience a large life change.
I always admire you builders for your staying power and patience! I would want to be flying it tomorrow not in seven years
I presume you must get as much pleasure in building as in flying to commit so much of your time and energy to such a project?
I had a friend who built an RV6A from plans not a kit and that took him five solid years of literally living in the garage and a very understanding partner.
Pace