Interesting - I couldn't remember when I first started using PowerTracks and BIAB so I sorted through a drawer full of manuals for various softwares I had obtained over the years and found the version 5.0 1998 Upgrade Documentation for PowerTracks. At the time new updates were half yearly. It confirms my vague remembrances of using version 4 1997 with the "Thwack" caused by overloaded digital tracks.

I was more interested in BIAB having read an article in the Keyboard Magazine?? and bought BIAB program with PowerTracks as a make weight which I may use occasionaly. I have ended up using PTW and Realband a good deal more frequently than BIAB, but all have their place in the work flow.