I don't bench anywhere near as much as you but I think as a raw lifter you're probably best staying away from the equipped methods and using more of a Fred Hatfield approach
Most of the research, which I can post if you wish but it's a bit boring and you need to pay for, shows that a power exercise followed by a limit weight exercise markedly increases strength. Fred Hatfield did this with his CAT training. CAT is a bit hard to do with straight weight as your body puts the breaks on as you near lock out. You can use the chains for this though and to lesser extent the bands. Fred Hatfield would use 70-80% and adding 10-15% extra as chains would get the desired effect. Obviously this is strength training so you'd do a few sets of 2-3 reps- it would look a lot like Sheiko. Then you could follow it up with a few straight weight maxes
This is just what Zatsiorsky/Tuchscherer/Hatfield would suggest, I don't see 60kg plus a load of chains for a few sets of 3 doing anything really. I've been doing this for my deadlift recently but with just straight weight (as you can attempt to clean a deadlift) and the results have been pretty good.