Here's the latest version of my snowcatcher for the 2016/17 season.
Mounted on the wooden frame we have a Pentax Auto Bellows with a Pentax Helcoid extension tube attached.
The lens is a El Nikkor 50mm F2.8 enlarging lens.
The camera is my Pentax K5, which I've hooked up via a HDMI cable to a Feelworld FW759 7" monitor which I use with liveview.
The flash is a Yongnuo YN560-IIIn which is triggered wirelessly by a Yongnuo RF-603N attached to the K5. I use the lid off a tin of Maxwell House coffee as a blue diffuser.
I got to try it out last night and here's the first image using this setup. Having a nice large screen in zoomed liveview certainly helped my old eyes to achieve good focus.