Quote from hlpsg:
Firstly, to hedge with the underlying, you need to have a strategy for mitigating whipsaws. That, IMHO, is going to be your #1 problem.
I agree. You should concentrate on your risk and not your "drivers". Gamma exposure is the risk, just like in all calendars. This strategy does nothing to address this risk and hence I find the return claims not credible.
As hlpsg stated, just saying your going to trade deltas doesn't mean you will be profitable at it. Gamma scalping in itself is an art form that is difficult to accomplish success with. Saying you're going to do it to manage your risk doesn't sound like a viable strategy to me. I wish you luck...