IMO JAGUAR VFD help needed

[asto]

Hi everybody!
I encounter a little problem operating my Denford Orac lathe with the IMO JAGUAR VC150 VFD.
I wanted to use the IMO VC150 in place of the Parajust because the last one lacks the capability for reversing.
The case here is, that the Parajust uses a 5k frequency control pot and the IMO VC150 uses a 10k pot. This means the Orac controller when applying the highest impendance for bringing the motor to a full stop. This will not happen and the motor is going to continue running at aprox. 300RPM because 5k is not enough for the IMO to completely cut the power to the spindle motor.
Also, the IMO was not fitted with a latching relay for start/stop control and the normally open momentary switch is not suitable for the IMO as is with the Parajust to activate this control.

If someone of you gents is familiar with the IMO JAGUAR VFD and successfully has made a similar modification using this inverter his advise on how one may overcome this different control impendance problem is highly appreciated.

cheers

Asto