Lamington NP- Black Canyon and the Lost World

Hi all,
A mate and I were hoping to get up to Lamington to do a walk from O'Reilly's down to the Lost World via Black Canyon. Our plan as it stands currently is to leave O'Reilly's in the morning, walk along the Border and Albert River Tracks down to Echo Point and camp there the first night, then on the second day following the track to the start of the canyon and dropping down into it, following the creek past Red Rock Cutting and then walking up to the Saddle camp site for the second night. Third day plan is to walk up the ridge and either get to the top of Mt Razorback and drop down into the Lost World and camp there for the third night, or if possible perhaps just keep going on and finish the walk in two nights- traverse through the Lost World and down the Western Ridge and then probably back out to the South to be picked up at Kerry Road or stay at the guesthouse.
A few questions:
Has anyone done this or a similar route and have any specific advice on it? How many creek crossings are to be expected in the Black Canyon, is this doable in the amount of time I've set out here, anything in particular we should be taking, etc.
What actually is the Red Rock Cutting and is it worth a visit? I've looked around but can't find any photos or information other than it's location.
Just how narrow and dangerous are the ridgelines on either end of the Lost World? I've seen a few photos and they look pretty hairy but would appreciate any personal advice or information.
What is the best time of year for doing this? At the moment around Easter looks likely, probably in those holidays or if it's not too cold maybe the mid year break.
Are the maps generated by QTOPO accurate enough for this kind of navigation? We've got the HEMA Lamington map already and will probably get a GPS too but having the QTOPO map if it's any use would be good too.
I've had a look around this site for similar walks and it looks to be great fun, albeit challenging.
Thanks for any help you can provide,
Louis
A mate and I were hoping to get up to Lamington to do a walk from O'Reilly's down to the Lost World via Black Canyon. Our plan as it stands currently is to leave O'Reilly's in the morning, walk along the Border and Albert River Tracks down to Echo Point and camp there the first night, then on the second day following the track to the start of the canyon and dropping down into it, following the creek past Red Rock Cutting and then walking up to the Saddle camp site for the second night. Third day plan is to walk up the ridge and either get to the top of Mt Razorback and drop down into the Lost World and camp there for the third night, or if possible perhaps just keep going on and finish the walk in two nights- traverse through the Lost World and down the Western Ridge and then probably back out to the South to be picked up at Kerry Road or stay at the guesthouse.
A few questions:
Has anyone done this or a similar route and have any specific advice on it? How many creek crossings are to be expected in the Black Canyon, is this doable in the amount of time I've set out here, anything in particular we should be taking, etc.
What actually is the Red Rock Cutting and is it worth a visit? I've looked around but can't find any photos or information other than it's location.
Just how narrow and dangerous are the ridgelines on either end of the Lost World? I've seen a few photos and they look pretty hairy but would appreciate any personal advice or information.
What is the best time of year for doing this? At the moment around Easter looks likely, probably in those holidays or if it's not too cold maybe the mid year break.
Are the maps generated by QTOPO accurate enough for this kind of navigation? We've got the HEMA Lamington map already and will probably get a GPS too but having the QTOPO map if it's any use would be good too.
I've had a look around this site for similar walks and it looks to be great fun, albeit challenging.
Thanks for any help you can provide,
Louis