> I had a vertical wall TBH but it was the devil of a job to raise a bar with comb still attached
I have found this to be true also. It's even difficult with the attachments cut as the comb is just a tad bit smaller than the inside of the hive all the way up until it clears the top. Not true for the sloped-sided variety.
>I probably won't build any more slope sided ones since interchangeability with the Langstroths is such a nice feature.
This is a nice feature, but i have built a sloped-sided hive to see what it's like first hand.
My Mom's other kids are smarter than me, but i'm not nearly as nice.