Korg Mono/Poly

that lfo speed mod is also quite useless to make. you can get crazy 
speed lfo's on mg-1 bu carefully placing the mg-1 waveform selector 
between the two saw waveforms.
and you can route that superfast lfo with the mg1 modwheel to the filter 
or to the pitch, and also the effects section uses that particular mg. 
no need for a superfast mg-2 imho.

i would only midify the mono/poly with that chd elektro midi kit, and 
maybe that s/h waveform thingie, altho i already get a s/h waveform with 
my kentron pro solo.
is that vcf>fm mod something that you can not acchieve with that lfo 
trick + effects section really?

that subosc mod seems like overkill since you already have 4 oscs. you 
can make the sound with 1-3 oscs, and use a the fourth osc an octave 
lower than the rest (with triangle or square it works nicely, but if you 
use triangle, remember to mix it louder than the other oscs for maximum 
effect!) and i usually have to turn down two oscs when recording stuff. 
othervise it won't fit the mix properly.

just my thoughts about modding the good old mono/poly.