This is a companion detail set for the Brengun Extra 330L kit#BRP48007. A full review of that kit is posted elsewhere on this site. The base kit will build up into a nice model but I can't imagine building it without this set.
There are so many details included such as seat belts, instrument panels, aileron assist paddles and aerobatic sight frames that the model doesn’t look complete without them.
In addition to the PE parts, there is a small acetate sheet that includes instruments that get trapped behind the PE parts and an inspection window that goes over a cutout under the horizontal stabilizer. Simply put, if you want to build this model, order this set at the same time.
Thank you to Brengun for the sample of another unique subject and to IPMS for sending it my way.