We have been looking to replace our forklift seatbelts with units that isolate ignition. These units do not allow the unit to be running unless the seatbelt is fastened. Problem is, all of our operations involve picking. We are afraid this change will result is a substantial increase in starter failures. Is a unit available that could isolate the transmission? We use four Catepillar forklifts; (GC25, T50D, GC25 & TGC25) as well as a newly acquired Clark GCX25E. One of these units already has a transmission interlock switch on the steering column that I assumed we could work with. Any thoughts?