Look at the mod for the IC-2720H the pic of the pcb board is the same as for the ic2725.
The IC-2725 has 4 diodes fitted just remove the two in the pic dont know what happens if you remove the other two.
I have tried this mod on my ic-2725 and it works fine and when you do a reset you do not have to push in the buttons for the wide tx hi...
Coverage is now
400 MHz to 469.999 MHz
136 MHz to 173.999 MHz