Also, see the video in this thread. Indoor junior F1D team member building a LPP in a little more than an hour.https://www.hippocketaeronautics.com/hp ... ic=14791.0
You will see that much of the Cezar Banks LPP thread is too basic for an experienced WS flier, but a number of the pros contribute ideas that are worth reading.
You can cover with OS film, the best fliers do this in order to reserve more of the weight budget for the motor stick and wing and stab spars. But, you can also do fine covering with super Ultrafilm (cheaper). The video show covering with condenser paper. I would not recommend this as it contracts and expands with humidity changes resulting in possible structure warping.
Also, it’s not that hard to build a simple prop blade mounting jig from scrap balsa instead of using the paper jig shown in the video. One more small thing; the video shows the prop blades being formed for only one hour. You can form on a 4” diameter cylinder or on a helical form (Mike Kirda sells these or you can build) and bake in an oven at about 180-200 degrees for 20 minutes or leave overnight to air dry. I wrap the blades onto a cylinder style form tightly with thin gauze bandage material (not tape or rubber strip as shown in the thread and video).