Thanks Mike and Bo.
@Bo, a new beaut Canon MP-E65 landed on my door step last week and these are the first batch at the lowest end of its range, which spans 1:1 to 5:1.
It is a beast of a lens to tame compared to my fully automated Canon 100mm F2.8 so I’m still learning the ropes at the 1:1 end before I climb the 5:1 mountain!
Cheers
Dennis