Gyroscopic Investing

My VP is currently a mix of about 75/25 of stocks/cash.  The stocks are a mix of mostly energy and natural resource stocks plus some metals/mining stocks and ETFs' (GDX, GDXJ, SLW, FCX).  I got to thinking, does anyone do a hybridized version of a PP as their VP??  I'm thinking of adding some long-term bonds to give my VP some (hopefully) additional stability like the PP has.  Any suggestions for this?  I hold TLT in my PP for the long bonds so may want something different for diversification purposes.  So my VP would look something like - 25% metals/mining stocks, 25% (mostly)natural resource stocks (BP, NRP, LINE, VLCCCF, RIG, SDRL, etc.), 25% Long-Bonds (??), 25% Cash (I use Vanguard short-term corporate in this account (VCSH).  Any thoughts??  I know I'm missing pure gold exposure, so wouldn't be opposed to adding some to the metals/mining portion.  I hold IAU in my PP so again may want a different gold ETF.  Or maybe use silver instead of gold??  Thanks in advance...

There was a short thread about a similar idea a while ago - see http://gyroscopicinvesting.com/forum/pe ... latile-pp/ and melveyr's comments in the thread he references, as well as the thread on engineered returns that MG references (http://gyroscopicinvesting.com/forum/pe ... -and-risk/),  With higher volatility assets the expected max drawdown will be greater, but the expected CAGR will be higher as well.