As promised here are the details of the evil mod to normalise/equalise the Series and Parallel volumes. It has been tried on an L-2500 Tribute, and the drawing is for the wiring on this and the L-2000 Tribute. It has not been tested yet on the L-2000 Tribute but the switch is wired the same.
Looking at Kens USA L-2000 wiring diagram it appears to be the same as the Tribute.
For single coil mod switches you will need to adapt the drawing l_2500_series_single_parallel_for_active.pdf that Ken has posted in the thread
viewtopic.php?f=9&t=112
You need to replace the 2 links on the RHS of the Series/Single/Parallel switch with 47K ohm 1/8th watt resistors. Some adjustment may be required of the resistor value for differing pickup characteristics. To increase the Series volume decrease the resistor, and to reduce the Series volume increase the resistor value.
fred
Edit.
Ooops, just had a good look at the diagram and realised that it needed a mod. The Yellow pickup lead to the opposite end of the 47K resistor as shown in the modified diagram.