If you are looking for the most portable and maneuverable track system, without sacrificing power or performance, there is not another small direct push model like the AMS 9120-SK Powerprobe. 
The rugged rubber tracks keep the unit moving when soil conditions get soft, wet or muddy with minimal disturbance to the work site. 
The probe can easily be removed to allow the use of the carrier vehicle and its accessories such as the bucket, pallet forks, and backfill blade.