Thank you for sharing.
It seems to me that wuth Rodinal/R09 it looks even better than with Ilford HC.
I thought about trying develope with Rodinal but wan't sure how many minutes I should develop it for. Thanks to your post I know now.
I just bought in the internet 10 rolls of Formapan 400, just to compare with Kentmere 400. Both are grainy and push very well but Formapan seems to have a old formula and deliver an old look which I also like.
Anyway, I like the result you got and it is what I want to archive, a more agressive heavy and grainy look.