Complex sentence: The more common DGA-15 is still a handsome aircraft, but widened to a five-place (two in front, three in the back); it's a little beefier, and not as lithe of line.
Split into simpler sentences: The more common DGA-15 is still a handsome aircraft. But as it was widened to a five place (two in front, three in the back), it's a little beefier, and not as lithe of line.