Komatsu Track Replacement

1) Anyone know where I can get operator and shop manuals? My local dealer can get the operator manual but not the shop manual.
2) Should I remove the pads from the old rails before or after I break the track and pull it off?
3) Should I try to save any of the bolts or just burn them all off? (Old owner says I can re-use, but I insisted on 150 new bolts -about 1/2 of them - anyway)
4) Where should I position the master link for pin removal/installation (I've seen responses stating on the idler and also bottom rear of sprocket).
5) Should I put the pads on the new rails before or after installing the chain on the tractor?
6) What should I torque the pad bolts to? I've seen a range of 150-300 pounds in previous responses.
7) Is there a rule of thumb for determining when the track is properly tensioned? 8) Am I asking for trouble rplacing the tracks but not the sprockets? 9) Should I even try this or spend $600 plus transportation to have it professionally done?

Thanks in advance for your advice. Can't wait start to start building hunting trails in northern Wisconsin!