when you said you were all over the place what did you mean....tired or the front of the bike was wandering left and right across the road....if the later when your out of the saddle and for instance pushing down on the left pedal it is the right side of your body the force is acting against so you need to be bracing that side...concentrate on keeping the wheel straight ahead and don't let the bike move too much under you a little is ok but too much is wasted energy....and practice practice practice!
SA Mrs SA Mrs Digger Soupy (my birfday on 13th too) Pudge 7755Matt MrsMatt Medic Girl (my birthday on the 13th tooo) H0NK TheEngineer Little Sister (depending on 2 things; me not getting into VLM and it not being the same weekend as HONC) SuckitupButtercup (dependent on whether I get into the VLM) Lee The Pea (Olympic) Calf
I've done it with both a 305 and now a 310xt......
works pretty good...more so on the road than mtbing.... and your not watching the trail...your cycling along occasionally looking for changes in the direction of the trail.... means you don't have to stop and dig a map out of your back pocket all the time.
Can be quite annoying on the mtb though where you might get 4 or more paths intersecting and only when you have gone 10-20 m's along do you realise you have taken the wrong one.....but even then it works pretty well and good for learning new routes you might not have tried otherwise.