Ford Driver's Capacitor Recipe

it took a few attempts as the CD tends to shatter nastily. wear goggles if you do it. not sure what final technique was, but remember using soldering iron to melt some bits out
also scoring surface, then put in vice with wooden blocks and snap off sections. connecting to the surface is tricky as the aluminium film is v.fragile. i drilled a hole and used some star washers to pierce the coating and contact the metal film
+ solder tags and nuts and bolts.
the picture was the prototype, the practical one i fitted inside a CD multipack case as it has convenient central axle and dust cover. it went up to about 600 picoFarad. (250pF typical for commercial tuning cap. in mw tuner)