If you're like me and don't have a table saw, get at least two clamps and one long straight piece of MDF. That will be your ruler for the jigsaw.
Clamp the ruler parallel to the line that you want to cut. Make sure you measure the distance between the blade itself and the guide. Mine comes to 3.4cm. I use a small MDF block to measure my distances. Quick and easy.
If you can hang on, my 4 sheets of 20mm MDF should arrive by this week and will take pics of each and every step, get someone nice enough around here to host a sit eofr me on their server.
Sony C90, 210 EQ
Seas 27TDF/C, RE XXX 6.5, custom xo (dyn 240GT sitting idle)
RF 60.2 amp
Soundstream picasso 1400.1D
Bass drive-by's are uncool.