Thanks Wallace. That's calmed me down a bit!
Funnily enough I do use Tri-X a lot, but have evolved a regime that means I expose it @ 200asa not 400. However; I have just bought some Neopan 400 and was going to run it at 400 to develop in DD-X (another new departure). BUT have also decided to try a light yellow/green filter (factor 1) which will take it back to 200! Am I my own worst enemy or what?
I realise f4 is not unreasonable, and I have an old Elmar 35mm lens that only hits a good spot at about f6.3 and above, but I was just aware how many of my shots in the first two rolls I took were at 15th and, not surprisingly, I did find that only about half of these were ok, the rest just off-sharp due to shake.
But it's a learning curve for me, and knowing that the slight wobble you commented on is not unusual is a comfort, thank you.
Any tips on Neopan 400/DD-X welcome.