These kits are not for inexperienced kit bashers. Correct cutting equipment and an assortment of files are a must. Use an Olfa cutter always. Excellent results will follow. Only use the templates as an approximate guide. They tend to be out a few millimeters. Measure twice, cut once as they say. These are examples made from Wills kits and building sheets.
I didn’t appreciate that there was quite a lot of diy cutting and modifying using the enclosed templates and materials but the package contents look high quality. I expected everything to be precut ready for simple assembly. I’ll view it as a modelling challenge!