Wiring mod done

I am the proud new 2nd owner of a red 2000 Mille. Love the bike always wanted one deal of a lifetime came up so I bought it. The bike has 18,000 miles on it. I checked the wiring from the stator/alternator and it has been upgraded to 12 gauge wire from the stator to the voltage regulator. BUT, the wiring mod had not been done, so I thought, great!, I'll do the mod myself. Went home last night and ran 2 12 gauge wires from the red black wires at the connector to the 30 amp fuse. I didn't cut the old wires, just spliced two new ones in, as per bossbobs directions. Then I ran 2 12 gauge wires from the red blue wires at the connector to the battery negative. Turned on the bike, and I had 14.54 volts at the battery...WOO HOO!! couldn't check the 4k rpm voltage as it was late and the bike is loud. Went for a ride this morning, checked the voltage before the ride and it was 14.5 at idle and 14 at 4k rpm. NICE! went for a 15 minute ride and checked the voltage when I got home.... 12.5 at idle and 12.1 at 4k rpm....DAMN IT!! I take it this is a heat issue. The regulator gets hot to the touch, but not so hot that you can't touch it...yellow wires from the stator aren't warm at all... before the wiring mod, I had approximately 13.2 at idle and 12.5 at 4k rpm.... tired voltage regulator I hope????, cause I want to get bikepainter's upgraded aftermarket regulator.... Could everyone give me your input please??? not a very good pic of the new beasty,If you are using the on board indicator it's not very acurate. Also these bikes are know for big variations in voltage at anytime. I was told this by David at Acumen in the UK. I check this myself vs the voltage changes on a 2000 Grand Prix. I hooked the acumen voltage reader to the Prix and it stayed at 14.4-14.2, at idle and higher rpms. On the Futura I've seen readings from 17 volts to 12 volts. If you aren't having any electrical or starting problems, don't sweat it. ,,,