Thanks, I'll keep them in mind if a wire transfer comes up in the future, that looks useful. Unfortunately, many of my non-US customers still request remitting in their native currency via paper check. And IB doesn't seem to accept paper checks from commercial entities other than banks.

Part of my forex broker's value add is they have banking points of presence in many nations, and can accept the check there, then convert to any currency I designate (typically USD). That would probably explain much of the spread between IB's and my FX broker's margins.