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Found a couple i30s in our local salvage yard in good shape so got the cluster from them to see how much work this would take.
I wanted to keep original mileage(my 5th gen is now at 323k). I tried the chip desoldering but failed on the i30 board so had to explore options
With modifications to the plastic board and the PCB holes for the gauges, the 5th gen board can fit into the I30 cluster. Next project replace climate control buttons as they are pretty scratched up!
Pics below. Before. Stock 5th gen. Black out effect of I30 I30 gauges with LED backlight instead of stock EL tube.
That was pretty slick...I'll be working on the solder joints of my 5.5th Gen fuel Quantity gauge....Inaccurate and slow to response to actual fuel level changes when moving the float lever by hand!