Hi Deane, I actually got more than a little help simply reading the title page of your Boxnet link.
Glad to hear you're enjoying your new software + module setup. Are you planning to integrate the vArranger-SD2 setup with your Tyros 4 when gigging, or reserve it more as an alternative performance option utililizing a dedicated controller keyboard ?
Does your new vAaranger + SD2 setup fullfill the expectations you had with the BK-7M?
Funny thing, me being a Tyros 4 owner as well, I feel no need for adding any add on sound or style module because Tyros 4 sounds and styles can so easily be tweaked to emulate the types of sounds I want, from "raw and in your face", to "polished and refined". I appreciate already having it all in my Tyros 4 with the 1gb Ram memory.
Deane, have fun with your new gear.