Who on this forum is currently running a Navigator? I have ordered a 27 hr Kohler powered 48" deck and am interested in some lessons learned - hopefully I will be able to avoid. Dependent upon the performance of the machine, I will be ordering at least one more this season. And yes, I checked into the Walker mower, however, this necessitates a change of dealership. I didn't want to do this due to the unconditional, outstanding support I receive from the dealer - I simply do not have the time to re-establish a similar relationship with a different dealership.