Very nice. I'm interested in your semi-stand approach. I've been doing a lot of stand dev of HP5+ in R09 (1:100) when using the Holga, as I have no idea how some of those images will have been exposed. Generally I get good results, but usually with not a lot of contrast. The highlights look like they could do with a bit more development. So far I have been letting it stand for 60 mins, with a gentle agitation (2-3 inversions) at the 30 min mark.
I'm planning to increase the agitation to boost the highlights - maybe a stronger agitation at the 20 and 40 minute marks. I had been thinking of 5-6 inversions, but I see you agitate for 30 secs at a time.
These images have a good tonal range; from the black of the car or the railings to the bright sky. Is this indicative of the contrast levels in the negative or did it require a lot of post-scanning manipulation?