Thank you all for your very detailed replies, although I'm still somewhat confused...
Firstly - to get the simple one out of the way - Nick, I'm using a bedding compound, but am doing it in multiple steps to avoid the sealant
1. bedding compound (actually a structural grade sealant) with the plate over finger tight (and clean out excess)
2. wait several days for total cure and torque to about 100 lbs/ft
3. wait several more days for compression
if any and torque to the final number as per CF consensus..
4. wait several more days for compression
if any and retorque to final number again.
Now, for the harder part... while the tables state 131 lbs/ft and most here agree on this lower torque value - why on earth to CNC and Tartan (per links in Gord's post) give 250lbs/ft?
For lubrication - I went to the local industrial bearings/bolts etc place and asked about this and they recommended "Loctite Silver Grade Anti-Seize Compound" - looking at the ingredients, it's full of graphite. So now I've applied this to the threads - some difference in feel, but nothing too dramatic. So my next question is "how do I threadlock something that's lubed"? (no space on thread for second nut, and I'm having enough difficulty ordering standard heavy hex nuts as it is, so I really don't think I'll be getting nyloc nuts or something fancy anytime this century - again, remember I'm in Australia
And finally, on clamped load - I've used the calculator on this site: FUTEK Bolt Torque Calculator | Bolt Torque Calculators
and used the following assumptions:
Major Bolt Diameter: 0.750 in
Bolt Thread Pitch
Bolt Proof Strength: 80000 psi
Recepticle Length: 0.734 in (height of one heavy hex nut)
Recepticle Strength: 80000 psi
Applied Tensile Load: 700 lb
k Factor: 0.2
Recommended Torque 2429.7 in-lb
Resultant Tension:16198 lb Maximum Torque 3240 in-lb
Resultant Tension:21597 lb
Now with these assumptions, the torque is 200 lbs/ft... still way over 130 lbs/ft.
Fiddling the assumptions a little to include bolts while heeling, say multiplying the load by 5, to 3500 lbs per bolt... actually decreases the required torque to about 170 lbs/ft. Obviously it's taking into account the fact that the weight itself will tension the bolt as well.
Having said this, going back to my question above - nothing is taking these numbers to 250lbs/ft as per CNC/Tartan.. why are they that high?
BUT - I'm convinced that the number is higher than 130, the only way to get the torque down that low is to fiddle the friction significantly lower (which in my case, even if you lube it with Superconducting Slippery Goo 2000(tm), with all the burrs on the threads, I really doubt it will go below the standard k=0.2 per a standard new thread)...
Also - if the info helps, there is no way on earth my washers/plates will turn (forwards OR backwards - they are effectively glued in)