Another way to get extras is to do a "chipswitch" mod, you can pull out the D2824 PLL and replace it with a D2816 PLL from a junk Cobra 29 if you wish.
If you do this, make sure you ground pin 20, and now you can tie pin 9 either high or low to get the extra channels. Tying pin 9 low (grounding) will get you 40 channels above channel 40, while tying pin 9 high (to PLL control voltage, I think +8V in this case) will get you 40 channels below 1.
However, you'll need to have the clarifier opened up so it will slide 5kc down, so you can get on the frequency, as doing the chipswitch will put you "inbetween" channels (i.e. 27.560 instead of 27.555).
I have done this mod with good success in the past. If you like the 40 up and 40 down this mod is great, but it really is much easier to install a Galaxy "N" kit, witch gives you +64 channels total. At worst, you may have to adjust the VCO and the tripler cans slightly to get output on all frequencies with the Galaxy kit.
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