"Is that close enough?"...

Sorry, guys. NO.

And you may have PLAYED your brother's. Have YOU tried to gig with it? Big difference, IMO.

Look, we can go round all day long, but if your sole point is to say that, as long as you work within the drastic limitations that WS impose, OK, you CAN use a WS to 'sort of' substitute for an arranger... But WHY? Even YOU don't have one or use it that way, live. You've got more sense than to do that, why criticize the rest of us for having the sense not to use one, either?

When you give up on your arranger, and gig solely on a WS, come back here and tell us how good it is. Until then...
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An arranger is just a tool. What matters is what you build with it..!