This is a complete board based around the tk2050 tripath chip - output up to 100 watts into 4 ohms.
This evening I just modded that board with a new set of improved Wurth 4.7uF inductors, a better and passive heatsink and a better input stage. See photos.
Will report further when I box it and fire it up. Will take a little while though - busy life at the moment.