User blog comment:Angren Túrë/Fleet Status Update 8/28/13/@comment-15108745-20130828165336/@comment-98.116.2.201-20130828173121

The YangXRen was made because everyone wants to utilize the Yang engines, even if we don't have a good haul design to use with it. As for the WeissXRen, the Ren haul design is the only one that won't clause immediate over heating in the Weiss engine.