Hi Don,
I’ve been editing for years using various tablets, including the Intuous range although mainly PC and some FCP legacy and just love it. I’ve little experience of FCPX and none of navigating the timeline with it but I just set up easy keyboard shortcuts for zooming in and out of the TL.
One small point I’ll mention is that I like using the pen like a pencil, resting the side of my hand on the tablet surface, using only small movements of the pen. I set this up in the tablet driver software using their mapping facility to map only a small, top left hand corner area, of the tablet to the whole screen. Works well for me.
Another thing you could do is assign one of the hardware controls on the Wacom, like the rotary controller on the Intuous4, to zoom in and out of the timeline.
Cheers Alan
XdcamEx & HD, C300, DSLRs, all sorts of production & post gear and a very untidy desk. On the East Coast of the UK