I have used monocoat (also Solartex, Ultracote etc.) hinges on many very large models, even quarter scale. Properly done, they are as reliable as any other type hinge, probably better than most. This is when you instal them like baseball stitches similar to the way the old cloth hinges were installed on U-control models many years ago. I have one Phaeton 90 with a Quadra 72 that has been using this type hinge on all surfaces for well over 12 years and probably thousands of flights with never a hinge failure.