Hello OutToLunch: Thanks for your advice, however, I don't think the size and complexity of the PCB justifies 4 layers. The PCB has just been completed and sent to production, and its only 3x3.5cm and contains only around 15 nets.
The power nets are routed on both sides of the print, each side being plated with 2oz of copper. The nets are made as planes/polygons as you suggested, and the total length of each net is less than 1cm with plenty of plane copper and vias to connect the two layers.
The prototype was made on a protytype board with only 3mm wide tracks (completely filled with tin upon component soldering), and it seemed to work relatively well during the small tests, I subjected it to.
What I hope to achieve with the manufactured PCB apart from ease of manufacture, is lower resistance in the PCB, as the whole circuit is basically inserted serially between the battery and the motor, so I want the lowest possible voltage drop over the PCB.
Let's see
Thanks all, again for your answers - This thread got longer and more interesting than I thought it would - not least due to the linkage to the guidelines further up. Very interesting.
Thanx