Due to the extreme condition the unit are used in, It could be very easy for someone to break a axle in 4 low diff lock or just 4 low, If and when you need to use both of these together be careful on how much gas you give it, These bigger unit have allot of power and if something is stopping the tire from turning the axle could break.
This is not just a issue with Powermax product, This applies to all large cc bikes.