Make yourself a clamp for holding your piece. Take 2 equally sized pieces of wood, ie 1/2 or 3/4" by 3/4" to 1 1/4" high and 6" or more long. Drill a 1/4" hole through both pieces, making sure the holes are spaced appropriately in line with each other, then using 2 4" to 6" long carriage bolts, washers and wing nuts, your clamp will hold your small part for compound cutting. Neighbor once gave me some leather upholstery material, which I glued to the clamping surfaces, to compensate for the saw kerf, and hold the piece equally. You don't want any interior movement while cutting or the piece may not come out right. I often will use a #5 blade, skip tooth blade for compound cutting.