A few post below you advised me to make a 720p25 capture preset to capture the Varicam offspeed contents and I've managed to do that and now I can capture both fast and slow mo clips and they are 25fps, instead 60fps which I did previously. The only thing with slow mo clips (the one I captured was shot at 50fps) is that I have to let it capture longer than the tape run if not I only get part of the clip and I think that's the behaviour.
The issue right now is that I am editing all these clips in a 720p 25fps timeline (with a Kona 2) and I can play it back using the Kona 720p25 playback setting but I can't record that out to the Panasonic AJ-1400 VTR as it doesn't record 720p25. If I set the Kona playback to 720p50, the VTR can see the images but when I play the timeline, it doesn't update the playback coz the output and timeline framerate does not match.
So I did the 720p50 XML trick (http://www.aulich-adamski.de) and copied the clips into this 50fps timeline and I can play it back using the Kona 720p50 playback setting but I had to render the timeline as it wouldn't play smoothly.