Lake Michigan Yacht Sales:
In 1982 I created this company to import yachts from Taiwan.
I became the Chicago area dealer for Young Sun Yachts. The Young
Sun yard produced a 35 foot Perry design double ender, a 43 foot
Ron Amy (EBI) design and a 54 footer.  All yachts were solidly
over built with beautiful craftsmanship.   I visited the yard in 1983 and
did a final inspected for a 35 and 43 footer.  I also stopped in a
number of other fine yards.

These are the yard drawings for the 35.  There is discourse about the design, Perry has taken credit for the original design but disavow the Young Sun Yard's yard drawings.
These are the yard drawings for the 43.  Ron Amy the designer is owner of EBI inc. which manufactures marine hardware.
The 43 came in two styles this is the Pilot House model. The Pilot had two hydraulic steering stations a large open deck with huge main solon.
This 43 is the Center Cockpit version.  This styles had a voluminous interior, large sleeping quarters.  There is so much space onboard you could lose you kids.
Various interior shots of the 43's
The 35 footer offered minor interior modifications.  There are rumors that the original builder was Hans Christian and later the mold was acquired by Young Sun.