The SWL-36, like the SWL-150, has a lot of variants. Links below.
Plane features (Each plane has the same features as the last, in addition to the new ones)
SWL-36-1 | Improved flaps
SWL-36-2 | New airfoil
SWL-36-3 | Windows & doors
SWL-36-4 | Improved performance
SWL-36-5 | Improved performance
SWL-36-MAX | There is a whole page on it, link.
Bman01 also made a variant, called the SWL-37. It is a trijet. The nose gear wasn't attached, however, so I fixed it.