Hi Ty,
This is interesting, the Smith Lark I have, wing span is 57.5", 620 sq in., the spec you show is 56 Wing Span, 610 sq in. I wonder if the kit I have is newer?? The Kit is great, nice wood, cut well, many great parts, Mr. Smith did a great job.
The Skylark I have is one of the Skylark Ed Southland and Randy Smith made up to send to Sterling to develop the Sterling Skylark by Ed Southland. Randy told me that Sterling made a error in one of the ribs, (which one not sure) and the wing is not quite in line?? Knowing me probably wrong on this item also??? (I checked the Skylark I have in the garage and I believe this to be true???)
"Skylark"
Plans by: Ed Southland Randy Smith
Drawn by: Postal Service put their darn shipping sticker over this item???
Aero Products
1880 Scenic Highway
Snellville, Georgia 30278
Ph. 404-979-2035
Thats all I know, cause thats what is listed on the box??? This Kit is also great, with good wood, parts, etc.