Hello Eric,
I was looking at reviews of the Pentax shift lens and, lo and behold, saw a picture from Visby! I used to live there and still have a summer house on Gotland.
Then I saw that you use a K-1 and own a Pentax Bellows unit.
For your information: I recently adapted the Bellows unit to the K-1. I had to remove some metal, nor very much, from the Bellows unit. Now it works well with the K-1.
PENTAX Auto Bellows K and Slide Copier K reviews - Pentax Camera Accessory Review Database