I have done hundreds of inlays. I use 3/8" cedar and inlay 3/8" soft maple into it. I also use have used oak, walnut, and maple. I have used mahogany a few times also. I have one of my scroll saws set to 2.2 degrees, approximately, that I use only for inlays. I set my angle with a Wixie but you can also do it by trail and error and it is just as good a way to do it. Stack the two woods you want to use, scraps. Do some trial cuts starting at 2 degrees and adjusting up until you get the fit needed. Start at the edge and cut out the shape of a mushroom, freehand, and see how it fits. With the table tilted down on the left of the blade and keeping the image you want to inlay to the right of the blade make your mushroom cut and see how well the bottom wood fits into the upper wood after it is cut. If it will not go all the way up you need to lessen the angle and if the bottom wood comes up to high you need to sharpen the angle closer to 3 degrees. I move mine about two tenths of a degree at a time. Remember a little too loose a fit is better than too tight a fit. I inlay into cedar mostly and if it is too tight a fit and I try hammering it in place with a plastic hammer I split the cedar. Perfect fit can be attained with many trial and error mushrooms. I leave most of mine just a little loose and fill any slight gaps with a mixture of white glue and sanding powder of the base wood. Cedar in my case. I use Flying Dutchman Polar #5 blades but whatever you use be consistent. PM me if you would like more clarification on this.