So I did PE4 today, and I found it was quite a bit more difficult than I had expected to keep my lower back on the ground and feet together. I realise this may apply for every element as I go through, but it made me think a little.
Which elements have other people found *unexpectedly* difficult so far, and why?
As an addendum, which ones are people particularly dreading as bottlenecks?
For me it's HS/PE5>iM; I tried this also today and found it was slightly better than I'd expected (shoulder + 1.5-2x hand width each side with 10lb), but certainly needing at least 1-2 microcycles work.