Time to drop the physics and place your faith in the squat god. Only he/she can help you now. Reason has failed. Squat and pray.i think that i will actually argue with my observed data and say that the press is the only real max. the "real" deadlift is probably higher and the "real" squat lower.
as for box jumps, it seems like i can do those all day long with no real effect. and by box jumps, i don't mean normal "step off a 15-inch box and stop yourself in a squatting position". i mean the pulled-from-the-textbook/supposed-to-be-so-hard-it-is-reserved-for-professional-athletes kind where you step off of a 24-inch step, impacting in the squat position and instantly springing up into a maximal jump and *then* landing in the same frozen parallel squat position trying to minimize the travel when striking the ground. for 3 or 4 sets of 10 repetitions.... i can do little ankle hops with locked knees with 40lbs of sand on my shoulders and forget what i'm doing and do double the repetitions that you're supposed to.
this is not to try to say i'm super awesome or anything. it is just that i don't seem to notice any effect even when doing what, by all accounts, seems to be a pretty intense regiment. so my current theory is that the "neural" component or whatever they call it is probably pretty decent since i am able to jump fairly well with what appear to be pretty weak legs. i want to increase the strength part and then see if that does anything.
and based on the jumping, i should be able to lift a lot more than i do on the squat. i mean, if you do some really oversimplified physics, we could think of jumping as having a launch phase and a flight phase. the flight phase will store up (as gravitational potential energy) V = mgh, right? then (assume a spherical cow...) suppose the launch phase consists of a constant force applied over the launch distance: K = Fd = kmgd. where m=mass of body, g=gravitational constant, h=maximum height reached, d=depth of crouch at start of launch phase, k=multiplier to express force in terms of bodyweights. ok, so overall, V = K, so mgh = kmgd -> h = kd. meaning that the vertical jump is the product of the bodyweight standardized pressing ability of the legs and the depth of the crouch over which you can maintain that force application. well, i roughly know h and d: h = 24inches, d is somewhere between 6 and 12 inches. so the force multiplier will then be in the range of 2 to 4 (and yes, that will include some calf action as well, but calves alone don't get me off the ground with locked knees; once i'm bouncing i can get like 4 inches or something). thus, the legs have to put out 1 to 3 extra bodyweight equivalents. so at the upper end, that means 3*155 = 465lb squat?
anyways, if there were an easy answer....
Butt seriously, I think if you feel comfortable in your technique, it should be pretty easy to test your real deadlift. Besides making sure you have a stiff, neutral back, it's probably the easiest lift technique-wise. Then again, I'm wondering when I'll next feel the urge to test my true 1RM. I'm pretty satisfied seeing gradual improvements in my 5RM, and it's a lot less taxing mentally. I think there's also something of a trade-off between the intensity of heavy singles, and the ability to do lighter quintuples more frequently. I dunno, I guess I'll just stick to the 6x10 plan and do singles whenever I'm in the mood.
Anyway, you've established some kind of ratio, now it's a matter of what you make of them. I'm wondering if, as seems to be the case, now that my Cable Row and 1-DB Row are close to 1:1 with my Bench, if it really makes sense to hold back on the Bench until my Squat, Deadlift, and OH Press catch up. Maybe they never will. Maybe as I get stronger on the latter lifts, my Bench will continue to increase without much effort? The nice thing about those ratios, even if we don't follow them that strictly, is that they get us thinking about these sorts of things. At the very least, I'm pretty sure I'm doing the right thing by putting my weakest lifts, as judged by those ratios, first in the routine, and often adding extra sets to them.