B6200 1640 FEL control valve

[B6200]

I was wondering if anyone out there has rebuilt a hydraulic control valve on a b6200 1640 FEL. The valve is working but is leaking by to tank when bucket is raised and tractor is not running. The valve is made by Danfoss and I have the kubota factory rebuild kit. I have owned the tractor for 18 years and currently it has 900hrs on it. I have rebuilt all the bucket hyd cylinders. Made oversize pins and reamed out pivot points to fit pins on Bucket and Loader. Correcting the control valve would make it operate like new. Should I try to rebuild it or replace it ? Any thoughts would be appreciated.