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Thanks for showing off a make! Nice to see my design go to use! Glad its working well for you.
I'll add some info about piecing the parts together.

Regarding the shrinking comment- I don't recommend doing this. The reason is that the tolerance between the tabs and the slots is set for a snug fit. Scaling the part will also scale the tolerance, making it possibly difficult, or impossible to key together. Another reason is that if the fins are made smaller, the weep holes will not be as effective since they will be smaller too. Also, if the fins were any closer together from scaling the parts down, condensation may not flow between them well. I suppose its worth a shot...