I built this kit many years ago. Don't worry about not having instructions, they weren't worth the paper they were printed on. This thing is a typical Royal kit - A ROYAL PIA!

It was my first "Builder's Kit" It reminded me very much of the days of scratch building.

As I recall, I was trying to figure out which way the Fins were built - Was the front of the bottom rib behind the LE or underneath it? (See first Pic)

The drawing on the plan was actually an optical illusion (I am not kidding about this) Do you remember the famous Optical illusion that I have pictured below (Second Pic)? Well the plans actually had a similar drawing for the fin rib placement.

So whether you get the plans or not, count on doing a lot of the engineering yourself

Also, for what it's worth, if I could only have one, I would take the plans over the manual.