After all the very helpful suggestions in my other Giant thread, I began today using Geoff's suggestion of 1.0 with 2x32kg using the CPP, dropping the bells into the rack. I don't know whether it was the rusty groove or something else but my muscular stamina died relatively quickly (my heart and lungs were fine). I only managed 4 complete sets of 5, and I actually failed the 5th rep of the 5th set. That was about halfway through my 30-minute session so I decided then and there to proceed with 3.0 instead, completing 3 sets of 2 in the remaining time.
Perhaps I should have rested longer between push presses (I was averaging around 3 minutes) but it didn't feel right to continue with sets of 5, especially knowing I'd have had 6s coming up in two days!
So overall it was a combination of thrilling and disappointing not to have completed a session the way I began but at least it confirms the way forward: 3.0 with the 32s for a round or two before hitting 1.0 with them.
On a more frustrating note, it felt like something was 'catching' underneath my left rear delt as I neared lock-out - no matter which rep in the set - so it wasn't fatigue. Does this sound familiar to anyone?