Branching off from the slacked-ukulele discussion, has anyone ever tried the Portuguese ancestor (not sure of any difference) cavaquinho or cavaco? This is a similarly sized 4-string instrument, but with steel strings, usually tuned DGBD. I'd like to try one, because slack key guitar style slides don't sound as good with a ukulele's nylon strings.
I am aware of the cavaquinho but have never had an opportunity to try one.
It is somewhat tougher to slide well on nylon strings, but keep at it. My issue with slack-key tunes on a four string instrument is the missing alternating bass lines. It works fine if I'm playing along with a bass player or a guitar, but just a ukulele by itself sounds a little anemic with slack key. Better players than I can make it work though.